first upload all files

Modules/Import/Http/Controllers/Admin/DownloadCsvController.php

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+<?php
+
+namespace Modules\Import\Http\Controllers\Admin;
+
+class DownloadCsvController
+{
+    /**
+     * Display a listing of the resource.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        $import_types = ['product' => 'products.csv'];
+
+        if (array_key_exists(request('import_type'), $import_types)) {
+            $path = storage_path('app/csv_templates/' . $import_types[request('import_type')]);
+
+            return response()->download($path);
+        }
+    }
+}

Modules/Import/Http/Controllers/Admin/ImporterController.php

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+<?php
+
+namespace Modules\Import\Http\Controllers\Admin;
+
+use Maatwebsite\Excel\Excel;
+use Modules\Import\Imports\ProductImport;
+use Maatwebsite\Excel\Facades\Excel as ExcelFacade;
+use Modules\Import\Http\Requests\StoreImporterRequest;
+
+class ImporterController
+{
+    /**
+     * Display a listing of the resource.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        return view('import::admin.importer.index');
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     *
+     * @param \Modules\Import\Http\Requests\StoreImporterRequest $request
+     * @return \Illuminate\Http\Response
+     */
+    public function store(StoreImporterRequest $request)
+    {
+        @set_time_limit(0);
+
+        $importers = ['product' => ProductImport::class];
+
+        ExcelFacade::import(new $importers[$request->import_type], $request->file('csv_file'), null, Excel::CSV);
+
+        if (session()->has('importer_errors')) {
+            return back()->with('error', trans('import::messages.there_was_an_error_on_rows', [
+                'rows' => implode(', ', session()->pull('importer_errors', [])),
+            ]));
+        }
+
+        return back()->with('success', trans('import::messages.the_importer_has_been_run_successfully'));
+    }
+}