first upload all files

Modules/Media/Eloquent/HasMedia.php

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+<?php
+
+namespace Modules\Media\Eloquent;
+
+use Modules\Media\Entities\File;
+
+trait HasMedia
+{
+    /**
+     * The "booting" method of the trait.
+     *
+     * @return void
+     */
+    public static function bootHasMedia()
+    {
+        static::saved(function ($entity) {
+            $entity->syncFiles(request('files', []));
+        });
+    }
+
+    /**
+     * Get all of the files for the entity.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\MorphToMany
+     */
+    public function files()
+    {
+        return $this->morphToMany(File::class, 'entity', 'entity_files')
+            ->withPivot(['id', 'zone'])
+            ->withTimestamps();
+    }
+
+    /**
+     * Filter files by zone.
+     *
+     * @param string $zone
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    public function filterFiles($zone)
+    {
+        return $this->files()->wherePivot('zone', $zone);
+    }
+
+    /**
+     * Sync files for the entity.
+     *
+     * @param array $files
+     */
+    public function syncFiles($files = [])
+    {
+        $entityType = get_class($this);
+
+        foreach ($files as $zone => $fileIds) {
+            $syncList = [];
+
+            foreach (array_wrap($fileIds) as $fileId) {
+                if (! empty($fileId)) {
+                    $syncList[$fileId]['zone'] = $zone;
+                    $syncList[$fileId]['entity_type'] = $entityType;
+                }
+            }
+
+            $this->filterFiles($zone)->detach();
+            $this->filterFiles($zone)->attach($syncList);
+        }
+    }
+}