diff --git a/api/src/attachment/controllers/attachment.controller.spec.ts b/api/src/attachment/controllers/attachment.controller.spec.ts
index 34b19ef0..e8c96d88 100644
--- a/api/src/attachment/controllers/attachment.controller.spec.ts
+++ b/api/src/attachment/controllers/attachment.controller.spec.ts
@@ -39,7 +39,11 @@ import { attachment, attachmentFile } from '../mocks/attachment.mock';
 import { AttachmentRepository } from '../repositories/attachment.repository';
 import { Attachment, AttachmentModel } from '../schemas/attachment.schema';
 import { AttachmentService } from '../services/attachment.service';
-import { AttachmentResourceRef } from '../types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '../types';
 
 import { AttachmentController } from './attachment.controller';
 
@@ -138,8 +142,8 @@ describe('AttachmentController', () => {
         name: attachmentFile.originalname,
         location: expect.stringMatching(new RegExp(`^/${name}`)),
         resourceRef: AttachmentResourceRef.BlockAttachment,
-        access: 'public',
-        createdByRef: 'User',
+        access: AttachmentAccess.Public,
+        createdByRef: AttachmentCreatedByRef.User,
         createdBy: '9'.repeat(24),
       });
       expect(result).toEqualPayload(
@@ -147,7 +151,7 @@ describe('AttachmentController', () => {
           {
             ...attachment,
             resourceRef: AttachmentResourceRef.BlockAttachment,
-            createdByRef: 'User',
+            createdByRef: AttachmentCreatedByRef.User,
             createdBy: '9'.repeat(24),
           },
         ],
diff --git a/api/src/attachment/controllers/attachment.controller.ts b/api/src/attachment/controllers/attachment.controller.ts
index 278fa7c4..8f794e03 100644
--- a/api/src/attachment/controllers/attachment.controller.ts
+++ b/api/src/attachment/controllers/attachment.controller.ts
@@ -46,6 +46,7 @@ import {
 import { AttachmentGuard } from '../guards/attachment-ability.guard';
 import { Attachment } from '../schemas/attachment.schema';
 import { AttachmentService } from '../services/attachment.service';
+import { AttachmentAccess, AttachmentCreatedByRef } from '../types';
 
 @UseInterceptors(CsrfInterceptor)
 @Controller('attachment')
@@ -131,7 +132,10 @@ export class AttachmentController extends BaseController<Attachment> {
     @UploadedFiles() files: { file: Express.Multer.File[] },
     @Req() req: Request,
     @Query()
-    { resourceRef, access = 'public' }: AttachmentContextParamDto,
+    {
+      resourceRef,
+      access = AttachmentAccess.Public,
+    }: AttachmentContextParamDto,
   ): Promise<Attachment[]> {
     if (!files || !Array.isArray(files?.file) || files.file.length === 0) {
       throw new BadRequestException('No file was selected');
@@ -153,7 +157,7 @@ export class AttachmentController extends BaseController<Attachment> {
         resourceRef,
         access,
         createdBy: userId,
-        createdByRef: 'User',
+        createdByRef: AttachmentCreatedByRef.User,
       });
 
       if (attachment) {
diff --git a/api/src/attachment/dto/attachment.dto.ts b/api/src/attachment/dto/attachment.dto.ts
index d5e0f68a..c10d0096 100644
--- a/api/src/attachment/dto/attachment.dto.ts
+++ b/api/src/attachment/dto/attachment.dto.ts
@@ -27,9 +27,6 @@ import {
   AttachmentAccess,
   AttachmentCreatedByRef,
   AttachmentResourceRef,
-  TAttachmentAccess,
-  TAttachmentCreatedByRef,
-  TAttachmentResourceRef,
 } from '../types';
 
 export class AttachmentMetadataDto {
@@ -76,7 +73,7 @@ export class AttachmentMetadataDto {
   @IsString()
   @IsNotEmpty()
   @IsIn(Object.values(AttachmentResourceRef))
-  resourceRef: TAttachmentResourceRef;
+  resourceRef: AttachmentResourceRef;
 
   /**
    * Attachment Owner Type
@@ -88,7 +85,7 @@ export class AttachmentMetadataDto {
   @IsString()
   @IsNotEmpty()
   @IsIn(Object.values(AttachmentCreatedByRef))
-  createdByRef: TAttachmentCreatedByRef;
+  createdByRef: AttachmentCreatedByRef;
 
   /**
    * Attachment Access
@@ -100,7 +97,7 @@ export class AttachmentMetadataDto {
   @IsString()
   @IsNotEmpty()
   @IsIn(Object.values(AttachmentAccess))
-  access: TAttachmentAccess;
+  access: AttachmentAccess;
 
   /**
    * Attachment Owner : Subscriber or User ID
@@ -147,7 +144,7 @@ export class AttachmentContextParamDto {
   @IsString()
   @IsIn(Object.values(AttachmentResourceRef))
   @IsNotEmpty()
-  resourceRef: TAttachmentResourceRef;
+  resourceRef: AttachmentResourceRef;
 
   @ApiPropertyOptional({
     description: 'Attachment Access',
@@ -156,5 +153,5 @@ export class AttachmentContextParamDto {
   @IsString()
   @IsIn(Object.values(AttachmentAccess))
   @IsOptional()
-  access?: TAttachmentAccess;
+  access?: AttachmentAccess;
 }
diff --git a/api/src/attachment/guards/attachment-ability.guard.ts b/api/src/attachment/guards/attachment-ability.guard.ts
index be5deea3..224f0947 100644
--- a/api/src/attachment/guards/attachment-ability.guard.ts
+++ b/api/src/attachment/guards/attachment-ability.guard.ts
@@ -26,7 +26,7 @@ import { Action } from '@/user/types/action.type';
 import { TModel } from '@/user/types/model.type';
 
 import { AttachmentService } from '../services/attachment.service';
-import { AttachmentResourceRef, TAttachmentResourceRef } from '../types';
+import { AttachmentResourceRef } from '../types';
 import {
   isAttachmentResourceRef,
   isAttachmentResourceRefArray,
@@ -42,7 +42,7 @@ export class AttachmentGuard implements CanActivate {
 
   private permissionMap: Record<
     Action,
-    Record<TAttachmentResourceRef, [TModel, Action][]>
+    Record<AttachmentResourceRef, [TModel, Action][]>
   > = {
     // Read attachments by ref
     [Action.READ]: {
@@ -169,7 +169,7 @@ export class AttachmentGuard implements CanActivate {
   private async isAuthorized(
     action: Action,
     user: Express.User & User,
-    resourceRef: TAttachmentResourceRef,
+    resourceRef: AttachmentResourceRef,
   ): Promise<boolean> {
     if (!action) {
       throw new TypeError('Invalid action');
diff --git a/api/src/attachment/mocks/attachment.mock.ts b/api/src/attachment/mocks/attachment.mock.ts
index cbc885b8..025b929b 100644
--- a/api/src/attachment/mocks/attachment.mock.ts
+++ b/api/src/attachment/mocks/attachment.mock.ts
@@ -9,7 +9,11 @@
 import { Stream } from 'node:stream';
 
 import { Attachment } from '../schemas/attachment.schema';
-import { AttachmentResourceRef } from '../types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '../types';
 
 export const attachment: Attachment = {
   name: 'Screenshot from 2022-03-11 08-41-27-2a9799a8b6109c88fd9a7a690c1101934c.png',
@@ -18,12 +22,12 @@ export const attachment: Attachment = {
   location:
     '/Screenshot from 2022-03-11 08-41-27-2a9799a8b6109c88fd9a7a690c1101934c.png',
   resourceRef: AttachmentResourceRef.BlockAttachment,
-  access: 'public',
+  access: AttachmentAccess.Public,
   id: '65940d115178607da65c82b6',
   createdAt: new Date(),
   updatedAt: new Date(),
   createdBy: '1',
-  createdByRef: 'User',
+  createdByRef: AttachmentCreatedByRef.User,
 };
 
 export const attachmentFile: Express.Multer.File = {
@@ -49,12 +53,12 @@ export const attachments: Attachment[] = [
       '/app/src/attachment/uploads/Screenshot from 2022-03-11 08-41-27-2a9799a8b6109c88fd9a7a690c1101934c.png',
     channel: { ['some-channel']: {} },
     resourceRef: AttachmentResourceRef.BlockAttachment,
-    access: 'public',
+    access: AttachmentAccess.Public,
     id: '65940d115178607da65c82b7',
     createdAt: new Date(),
     updatedAt: new Date(),
     createdBy: '1',
-    createdByRef: 'User',
+    createdByRef: AttachmentCreatedByRef.User,
   },
   {
     name: 'Screenshot from 2022-03-18 08-58-15-af61e7f71281f9fd3f1ad7ad10107741c.png',
@@ -64,11 +68,11 @@ export const attachments: Attachment[] = [
       '/app/src/attachment/uploads/Screenshot from 2022-03-18 08-58-15-af61e7f71281f9fd3f1ad7ad10107741c.png',
     channel: { ['some-channel']: {} },
     resourceRef: AttachmentResourceRef.BlockAttachment,
-    access: 'public',
+    access: AttachmentAccess.Public,
     id: '65940d115178607da65c82b8',
     createdAt: new Date(),
     updatedAt: new Date(),
     createdBy: '1',
-    createdByRef: 'User',
+    createdByRef: AttachmentCreatedByRef.User,
   },
 ];
diff --git a/api/src/attachment/schemas/attachment.schema.ts b/api/src/attachment/schemas/attachment.schema.ts
index 7d8e6b8e..a4675379 100644
--- a/api/src/attachment/schemas/attachment.schema.ts
+++ b/api/src/attachment/schemas/attachment.schema.ts
@@ -27,9 +27,6 @@ import {
   AttachmentAccess,
   AttachmentCreatedByRef,
   AttachmentResourceRef,
-  TAttachmentAccess,
-  TAttachmentCreatedByRef,
-  TAttachmentResourceRef,
 } from '../types';
 import { MIME_REGEX } from '../utilities';
 
@@ -94,19 +91,19 @@ export class AttachmentStub extends BaseSchema {
    * Type of the createdBy (depending on the createdBy type)
    */
   @Prop({ type: String, enum: Object.values(AttachmentCreatedByRef) })
-  createdByRef: TAttachmentCreatedByRef;
+  createdByRef: AttachmentCreatedByRef;
 
   /**
    * Resource reference of the attachment
    */
   @Prop({ type: String, enum: Object.values(AttachmentResourceRef) })
-  resourceRef: TAttachmentResourceRef;
+  resourceRef: AttachmentResourceRef;
 
   /**
    * Access level of the attachment
    */
   @Prop({ type: String, enum: Object.values(AttachmentAccess) })
-  access: TAttachmentAccess;
+  access: AttachmentAccess;
 
   /**
    * Optional property representing the URL of the attachment.
diff --git a/api/src/attachment/services/attachment.service.ts b/api/src/attachment/services/attachment.service.ts
index f4721b2b..94e55985 100644
--- a/api/src/attachment/services/attachment.service.ts
+++ b/api/src/attachment/services/attachment.service.ts
@@ -30,7 +30,7 @@ import { BaseService } from '@/utils/generics/base-service';
 import { AttachmentMetadataDto } from '../dto/attachment.dto';
 import { AttachmentRepository } from '../repositories/attachment.repository';
 import { Attachment } from '../schemas/attachment.schema';
-import { AttachmentResourceRef, TAttachmentResourceRef } from '../types';
+import { AttachmentResourceRef } from '../types';
 import {
   fileExists,
   generateUniqueFilename,
@@ -163,7 +163,7 @@ export class AttachmentService extends BaseService<Attachment> {
    * @param ref The attachment resource reference
    * @returns The root directory path
    */
-  getRootDirByResourceRef(ref: TAttachmentResourceRef) {
+  getRootDirByResourceRef(ref: AttachmentResourceRef) {
     return ref === AttachmentResourceRef.SubscriberAvatar ||
       ref === AttachmentResourceRef.UserAvatar
       ? config.parameters.avatarDir
diff --git a/api/src/attachment/types/index.ts b/api/src/attachment/types/index.ts
index ae2ae728..66c613f7 100644
--- a/api/src/attachment/types/index.ts
+++ b/api/src/attachment/types/index.ts
@@ -17,8 +17,6 @@ export enum AttachmentCreatedByRef {
   Subscriber = 'Subscriber',
 }
 
-export type TAttachmentCreatedByRef = `${AttachmentCreatedByRef}`;
-
 /**
  * Defines the various resource references in which an attachment can exist.
  * These resource references influence how the attachment is uploaded, stored, and accessed:
@@ -32,15 +30,11 @@ export enum AttachmentResourceRef {
   MessageAttachment = 'Message', // Files sent or received via messages, uploaded programmatically, accessible to users with inbox permissions.;
 }
 
-export type TAttachmentResourceRef = `${AttachmentResourceRef}`;
-
 export enum AttachmentAccess {
   Public = 'public',
   Private = 'private',
 }
 
-export type TAttachmentAccess = `${AttachmentAccess}`;
-
 export class AttachmentFile {
   /**
    * File original file name
diff --git a/api/src/attachment/utilities/index.ts b/api/src/attachment/utilities/index.ts
index 79649f76..13dead20 100644
--- a/api/src/attachment/utilities/index.ts
+++ b/api/src/attachment/utilities/index.ts
@@ -15,7 +15,7 @@ import { v4 as uuidv4 } from 'uuid';
 
 import { config } from '@/config';
 
-import { AttachmentResourceRef, TAttachmentResourceRef } from '../types';
+import { AttachmentResourceRef } from '../types';
 
 export const MIME_REGEX = /^[a-z-]+\/[0-9a-z\-.]+$/gm;
 
@@ -84,13 +84,13 @@ export const generateUniqueFilename = (originalname: string) => {
 /**
  * Checks if the given ref is of type TAttachmentResourceRef.
  *
- * @param ref - The ref to check.
+ * @param resourceRef - The ref to check.
  * @returns True if the ref is of type TAttachmentResourceRef, otherwise false.
  */
 export const isAttachmentResourceRef = (
-  ref: any,
-): ref is TAttachmentResourceRef => {
-  return Object.values(AttachmentResourceRef).includes(ref);
+  resourceRef: any,
+): resourceRef is AttachmentResourceRef => {
+  return Object.values(AttachmentResourceRef).includes(resourceRef);
 };
 AttachmentResourceRef;
 
@@ -102,7 +102,7 @@ AttachmentResourceRef;
  */
 export const isAttachmentResourceRefArray = (
   refList: any,
-): refList is TAttachmentResourceRef[] => {
+): refList is AttachmentResourceRef[] => {
   return (
     Array.isArray(refList) &&
     refList.length > 0 &&
diff --git a/api/src/channel/lib/Handler.ts b/api/src/channel/lib/Handler.ts
index 037f64fd..a803ae5b 100644
--- a/api/src/channel/lib/Handler.ts
+++ b/api/src/channel/lib/Handler.ts
@@ -23,7 +23,12 @@ import { v4 as uuidv4 } from 'uuid';
 
 import { Attachment } from '@/attachment/schemas/attachment.schema';
 import { AttachmentService } from '@/attachment/services/attachment.service';
-import { AttachmentFile, AttachmentResourceRef } from '@/attachment/types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentFile,
+  AttachmentResourceRef,
+} from '@/attachment/types';
 import { SubscriberCreateDto } from '@/chat/dto/subscriber.dto';
 import { AttachmentRef } from '@/chat/schemas/types/attachment';
 import {
@@ -260,8 +265,8 @@ export default abstract class ChannelHandler<
             type,
             size,
             resourceRef: AttachmentResourceRef.MessageAttachment,
-            access: 'private',
-            createdByRef: 'Subscriber',
+            access: AttachmentAccess.Private,
+            createdByRef: AttachmentCreatedByRef.Subscriber,
             createdBy: subscriber.id,
           });
         }),
@@ -327,7 +332,7 @@ export default abstract class ChannelHandler<
    * @return True, if requester is authorized to download the attachment
    */
   public async hasDownloadAccess(attachment: Attachment, _req: Request) {
-    return attachment.access === 'public';
+    return attachment.access === AttachmentAccess.Public;
   }
 
   /**
diff --git a/api/src/channel/lib/__test__/common.mock.ts b/api/src/channel/lib/__test__/common.mock.ts
index 0f6f04a8..7146dc80 100644
--- a/api/src/channel/lib/__test__/common.mock.ts
+++ b/api/src/channel/lib/__test__/common.mock.ts
@@ -7,7 +7,11 @@
  */
 
 import { Attachment } from '@/attachment/schemas/attachment.schema';
-import { AttachmentResourceRef } from '@/attachment/types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '@/attachment/types';
 import { ButtonType } from '@/chat/schemas/types/button';
 import {
   FileType,
@@ -90,8 +94,8 @@ const attachment: Attachment = {
     },
   },
   resourceRef: AttachmentResourceRef.BlockAttachment,
-  access: 'public',
-  createdByRef: 'User',
+  access: AttachmentAccess.Public,
+  createdByRef: AttachmentCreatedByRef.User,
   createdBy: null,
   createdAt: new Date(),
   updatedAt: new Date(),
diff --git a/api/src/chat/services/chat.service.ts b/api/src/chat/services/chat.service.ts
index 78ef8866..6f7512fd 100644
--- a/api/src/chat/services/chat.service.ts
+++ b/api/src/chat/services/chat.service.ts
@@ -12,7 +12,11 @@ import mime from 'mime';
 import { v4 as uuidv4 } from 'uuid';
 
 import { AttachmentService } from '@/attachment/services/attachment.service';
-import { AttachmentResourceRef } from '@/attachment/types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '@/attachment/types';
 import EventWrapper from '@/channel/lib/EventWrapper';
 import { config } from '@/config';
 import { HelperService } from '@/helper/helper.service';
@@ -282,8 +286,8 @@ export class ChatService {
               size,
               type,
               resourceRef: AttachmentResourceRef.SubscriberAvatar,
-              access: 'private',
-              createdByRef: 'Subscriber',
+              access: AttachmentAccess.Private,
+              createdByRef: AttachmentCreatedByRef.Subscriber,
               createdBy: subscriber.id,
             });
 
diff --git a/api/src/extensions/channels/web/base-web-channel.ts b/api/src/extensions/channels/web/base-web-channel.ts
index 3e0f911b..81b4ea4e 100644
--- a/api/src/extensions/channels/web/base-web-channel.ts
+++ b/api/src/extensions/channels/web/base-web-channel.ts
@@ -15,7 +15,11 @@ import { v4 as uuidv4 } from 'uuid';
 
 import { Attachment } from '@/attachment/schemas/attachment.schema';
 import { AttachmentService } from '@/attachment/services/attachment.service';
-import { AttachmentResourceRef } from '@/attachment/types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '@/attachment/types';
 import { ChannelService } from '@/channel/channel.service';
 import ChannelHandler from '@/channel/lib/Handler';
 import { ChannelName } from '@/channel/types';
@@ -627,8 +631,8 @@ export default abstract class BaseWebChannelHandler<
         size: Buffer.byteLength(data.file),
         type: data.type,
         resourceRef: AttachmentResourceRef.MessageAttachment,
-        access: 'private',
-        createdByRef: 'Subscriber',
+        access: AttachmentAccess.Private,
+        createdByRef: AttachmentCreatedByRef.Subscriber,
         createdBy: req.session?.web?.profile?.id,
       });
     } catch (err) {
@@ -694,8 +698,8 @@ export default abstract class BaseWebChannelHandler<
         size: file.size,
         type: file.mimetype,
         resourceRef: AttachmentResourceRef.MessageAttachment,
-        access: 'private',
-        createdByRef: 'Subscriber',
+        access: AttachmentAccess.Private,
+        createdByRef: AttachmentCreatedByRef.Subscriber,
         createdBy: req.session.web.profile?.id,
       });
     } catch (err) {
@@ -1355,7 +1359,7 @@ export default abstract class BaseWebChannelHandler<
    */
   public async hasDownloadAccess(attachment: Attachment, req: Request) {
     const subscriberId = req.session?.web?.profile?.id as string;
-    if (attachment.access === 'public') {
+    if (attachment.access === AttachmentAccess.Public) {
       return true;
     } else if (!subscriberId) {
       this.logger.warn(
@@ -1363,7 +1367,7 @@ export default abstract class BaseWebChannelHandler<
       );
       return false;
     } else if (
-      attachment.createdByRef === 'Subscriber' &&
+      attachment.createdByRef === AttachmentCreatedByRef.Subscriber &&
       subscriberId === attachment.createdBy
     ) {
       // Either subscriber wants to access the attachment he sent
diff --git a/api/src/migration/migrations/1735836154221-v-2-2-0.migration.ts b/api/src/migration/migrations/1735836154221-v-2-2-0.migration.ts
index b94a68af..2f699212 100644
--- a/api/src/migration/migrations/1735836154221-v-2-2-0.migration.ts
+++ b/api/src/migration/migrations/1735836154221-v-2-2-0.migration.ts
@@ -16,6 +16,7 @@ import attachmentSchema, {
   Attachment,
 } from '@/attachment/schemas/attachment.schema';
 import {
+  AttachmentAccess,
   AttachmentCreatedByRef,
   AttachmentResourceRef,
 } from '@/attachment/types';
@@ -619,8 +620,8 @@ const migrateAttachmentContents = async (
               $set: {
                 resourceRef: AttachmentResourceRef.ContentAttachment,
                 createdBy: adminUser.id,
-                createdByRef: 'User',
-                access: 'public',
+                createdByRef: AttachmentCreatedByRef.User,
+                access: AttachmentAccess.Public,
               },
             },
           );
@@ -682,8 +683,10 @@ const migrateAndPopulateAttachmentMessages = async ({
             msg.message.attachment.payload.attachment_id as string,
             {
               resourceRef: AttachmentResourceRef.MessageAttachment,
-              access: 'private',
-              createdByRef: msg.sender ? 'Subscriber' : 'User',
+              access: AttachmentAccess.Private,
+              createdByRef: msg.sender
+                ? AttachmentCreatedByRef.Subscriber
+                : AttachmentCreatedByRef.User,
               createdBy: msg.sender ? msg.sender : adminUser.id,
             },
           );
@@ -715,9 +718,13 @@ const migrateAndPopulateAttachmentMessages = async ({
               type: response.headers['content-type'],
               channel: {},
               resourceRef: AttachmentResourceRef.MessageAttachment,
-              access: msg.sender ? 'private' : 'public',
+              access: msg.sender
+                ? AttachmentAccess.Private
+                : AttachmentAccess.Public,
               createdBy: msg.sender ? msg.sender : adminUser.id,
-              createdByRef: msg.sender ? 'Subscriber' : 'User',
+              createdByRef: msg.sender
+                ? AttachmentCreatedByRef.Subscriber
+                : AttachmentCreatedByRef.User,
             });
 
             if (attachment) {
diff --git a/api/src/user/controllers/user.controller.ts b/api/src/user/controllers/user.controller.ts
index 968855b8..a30dfba2 100644
--- a/api/src/user/controllers/user.controller.ts
+++ b/api/src/user/controllers/user.controller.ts
@@ -31,7 +31,11 @@ import { Session as ExpressSession } from 'express-session';
 import { diskStorage, memoryStorage } from 'multer';
 
 import { AttachmentService } from '@/attachment/services/attachment.service';
-import { AttachmentResourceRef } from '@/attachment/types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '@/attachment/types';
 import { config } from '@/config';
 import { CsrfInterceptor } from '@/interceptors/csrf.interceptor';
 import { LoggerService } from '@/logger/logger.service';
@@ -296,8 +300,8 @@ export class ReadWriteUserController extends ReadOnlyUserController {
           size: avatarFile.size,
           type: avatarFile.mimetype,
           resourceRef: AttachmentResourceRef.UserAvatar,
-          access: 'private',
-          createdByRef: 'User',
+          access: AttachmentAccess.Private,
+          createdByRef: AttachmentCreatedByRef.User,
           createdBy: req.user.id,
         })
       : undefined;
diff --git a/api/src/utils/test/fixtures/attachment.ts b/api/src/utils/test/fixtures/attachment.ts
index 73fda51c..77ec0f93 100644
--- a/api/src/utils/test/fixtures/attachment.ts
+++ b/api/src/utils/test/fixtures/attachment.ts
@@ -10,7 +10,11 @@ import mongoose from 'mongoose';
 
 import { AttachmentCreateDto } from '@/attachment/dto/attachment.dto';
 import { AttachmentModel } from '@/attachment/schemas/attachment.schema';
-import { AttachmentResourceRef } from '@/attachment/types';
+import {
+  AttachmentAccess,
+  AttachmentCreatedByRef,
+  AttachmentResourceRef,
+} from '@/attachment/types';
 
 export const attachmentFixtures: AttachmentCreateDto[] = [
   {
@@ -24,8 +28,8 @@ export const attachmentFixtures: AttachmentCreateDto[] = [
       },
     },
     resourceRef: AttachmentResourceRef.ContentAttachment,
-    access: 'public',
-    createdByRef: 'User',
+    access: AttachmentAccess.Public,
+    createdByRef: AttachmentCreatedByRef.User,
     createdBy: '9'.repeat(24),
   },
   {
@@ -39,8 +43,8 @@ export const attachmentFixtures: AttachmentCreateDto[] = [
       },
     },
     resourceRef: AttachmentResourceRef.ContentAttachment,
-    access: 'public',
-    createdByRef: 'User',
+    access: AttachmentAccess.Public,
+    createdByRef: AttachmentCreatedByRef.User,
     createdBy: '9'.repeat(24),
   },
 ];
diff --git a/frontend/src/app-components/attachment/AttachmentInput.tsx b/frontend/src/app-components/attachment/AttachmentInput.tsx
index 7ed77c6d..f3fb71dc 100644
--- a/frontend/src/app-components/attachment/AttachmentInput.tsx
+++ b/frontend/src/app-components/attachment/AttachmentInput.tsx
@@ -13,7 +13,7 @@ import { forwardRef } from "react";
 import { useGet } from "@/hooks/crud/useGet";
 import { useHasPermission } from "@/hooks/useHasPermission";
 import { EntityType } from "@/services/types";
-import { IAttachment, TAttachmentResourceRef } from "@/types/attachment.types";
+import { AttachmentResourceRef, IAttachment } from "@/types/attachment.types";
 import { PermissionAction } from "@/types/permission.types";
 
 import AttachmentThumbnail from "./AttachmentThumbnail";
@@ -29,7 +29,7 @@ type AttachmentThumbnailProps = {
   onChange?: (id: string | null, mimeType: string | null) => void;
   error?: boolean;
   helperText?: string;
-  resourceRef: TAttachmentResourceRef;
+  resourceRef: AttachmentResourceRef;
 };
 
 const AttachmentInput = forwardRef<HTMLDivElement, AttachmentThumbnailProps>(
diff --git a/frontend/src/app-components/attachment/AttachmentUploader.tsx b/frontend/src/app-components/attachment/AttachmentUploader.tsx
index 112f111c..858eee22 100644
--- a/frontend/src/app-components/attachment/AttachmentUploader.tsx
+++ b/frontend/src/app-components/attachment/AttachmentUploader.tsx
@@ -17,7 +17,7 @@ import { getDisplayDialogs, useDialog } from "@/hooks/useDialog";
 import { useToast } from "@/hooks/useToast";
 import { useTranslate } from "@/hooks/useTranslate";
 import { EntityType } from "@/services/types";
-import { IAttachment, TAttachmentResourceRef } from "@/types/attachment.types";
+import { AttachmentResourceRef, IAttachment } from "@/types/attachment.types";
 
 import { AttachmentDialog } from "./AttachmentDialog";
 import AttachmentThumbnail from "./AttachmentThumbnail";
@@ -68,7 +68,7 @@ export type FileUploadProps = {
   enableMediaLibrary?: boolean;
   onChange?: (data?: IAttachment | null) => void;
   onUploadComplete?: () => void;
-  resourceRef: TAttachmentResourceRef;
+  resourceRef: AttachmentResourceRef;
 };
 
 const AttachmentUploader: FC<FileUploadProps> = ({
diff --git a/frontend/src/app-components/attachment/MultipleAttachmentInput.tsx b/frontend/src/app-components/attachment/MultipleAttachmentInput.tsx
index 11a3e069..fb4accc7 100644
--- a/frontend/src/app-components/attachment/MultipleAttachmentInput.tsx
+++ b/frontend/src/app-components/attachment/MultipleAttachmentInput.tsx
@@ -12,7 +12,7 @@ import { forwardRef, useState } from "react";
 
 import { useHasPermission } from "@/hooks/useHasPermission";
 import { EntityType } from "@/services/types";
-import { IAttachment, TAttachmentResourceRef } from "@/types/attachment.types";
+import { AttachmentResourceRef, IAttachment } from "@/types/attachment.types";
 import { PermissionAction } from "@/types/permission.types";
 
 import AttachmentThumbnail from "./AttachmentThumbnail";
@@ -28,7 +28,7 @@ type MultipleAttachmentInputProps = {
   onChange?: (ids: string[]) => void;
   error?: boolean;
   helperText?: string;
-  resourceRef: TAttachmentResourceRef;
+  resourceRef: AttachmentResourceRef;
 };
 
 const MultipleAttachmentInput = forwardRef<
diff --git a/frontend/src/hooks/crud/useUpload.tsx b/frontend/src/hooks/crud/useUpload.tsx
index 5f5a5e44..d7d8dcec 100644
--- a/frontend/src/hooks/crud/useUpload.tsx
+++ b/frontend/src/hooks/crud/useUpload.tsx
@@ -9,7 +9,7 @@
 import { useMutation, useQueryClient } from "react-query";
 
 import { QueryType, TMutationOptions } from "@/services/types";
-import { TAttachmentResourceRef } from "@/types/attachment.types";
+import { AttachmentResourceRef } from "@/types/attachment.types";
 import { IBaseSchema, IDynamicProps, TType } from "@/types/base.types";
 
 import { useEntityApiClient } from "../useApiClient";
@@ -27,7 +27,7 @@ export const useUpload = <
     TMutationOptions<
       TBasic,
       Error,
-      { file: File; resourceRef: TAttachmentResourceRef },
+      { file: File; resourceRef: AttachmentResourceRef },
       TBasic
     >,
     "mutationFn" | "mutationKey"
diff --git a/frontend/src/services/api.class.ts b/frontend/src/services/api.class.ts
index ddf14d0c..360abf80 100644
--- a/frontend/src/services/api.class.ts
+++ b/frontend/src/services/api.class.ts
@@ -9,7 +9,7 @@
 
 import { AxiosInstance, AxiosResponse } from "axios";
 
-import { TAttachmentResourceRef } from "@/types/attachment.types";
+import { AttachmentResourceRef } from "@/types/attachment.types";
 import { ILoginAttributes } from "@/types/auth/login.types";
 import { IUserPermissions } from "@/types/auth/permission.types";
 import { StatsType } from "@/types/bot-stat.types";
@@ -302,7 +302,7 @@ export class EntityApiClient<TAttr, TBasic, TFull> extends ApiClient {
     return data;
   }
 
-  async upload(file: File, resourceRef?: TAttachmentResourceRef) {
+  async upload(file: File, resourceRef?: AttachmentResourceRef) {
     const { _csrf } = await this.getCsrf();
     const formData = new FormData();
 
diff --git a/frontend/src/types/attachment.types.ts b/frontend/src/types/attachment.types.ts
index d70ba7b8..22a6c7ff 100644
--- a/frontend/src/types/attachment.types.ts
+++ b/frontend/src/types/attachment.types.ts
@@ -22,8 +22,6 @@ export enum AttachmentCreatedByRef {
   Subscriber = "Subscriber",
 }
 
-export type TAttachmentCreatedByRef = `${AttachmentCreatedByRef}`;
-
 /**
  * Defines the various resource references in which an attachment can exist.
  * These references influence how the attachment is uploaded, stored, and accessed:
@@ -37,7 +35,10 @@ export enum AttachmentResourceRef {
   MessageAttachment = "Message", // Files sent or received via messages, uploaded programmatically, accessible to users with inbox permissions.;
 }
 
-export type TAttachmentResourceRef = `${AttachmentResourceRef}`;
+export enum AttachmentAccess {
+  Public = "public",
+  Private = "private",
+}
 
 export interface IAttachmentAttributes {
   name: string;
@@ -46,8 +47,9 @@ export interface IAttachmentAttributes {
   location: string;
   url: string;
   channel?: Record<string, any>;
-  resourceRef: TAttachmentResourceRef;
-  createdByRef: TAttachmentCreatedByRef;
+  resourceRef: AttachmentResourceRef;
+  access: AttachmentAccess;
+  createdByRef: AttachmentCreatedByRef;
   createdBy: string | null;
 }