Difficulty organizing/controller structure in Laravel

Question

I’m having trouble structuring my controller Arquivocontroller. Main points of difficulty:

• Select that repeats in different methods
• I am restricting the search for the logged-in user ID, it would be but appropriate to use policy for this purpose, if yes, how to do this?
• At some points I use $this->Authorize('files', $Arq), this approach is correct?

Obs: the source code of the project is available at: https://github.com/fabiojaniolima/WebUpload

<?php
namespace App\Http\Controllers\Painel;
use Auth;
use App\Models\Arquivo;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Storage;

class ArquivoController extends Controller
{
    private $redirect;

    public function __construct()
    {
        $this->redirect = '/painel/arquivos';
    }

    public function index()
    {
        $arquivos = Arquivo::join('tags', 'tags.id', '=', 'arquivos.tag_id')
                        ->where('tags.user_id', Auth::id())
                        ->orderBy('created_at', 'desc')
                        ->select('arquivos.*')
                        ->paginate(25);
        return view('painel.arquivos.index', compact('arquivos'));
    }

    public function download($id)
    {
        $arq = Arquivo::join('tags', 'tags.id', '=', 'arquivos.tag_id')
                    ->where('arquivos.id', $id)
                    ->first();

        if (!$arq)
            abort(404);

        $this->authorize('arquivos', $arq);
        $caminho = storage_path('app/' . $arq->caminho);
        return response()->download($caminho, str_slug($arq->titulo, '-') . '.' . File::extension($caminho));
    }

    public function detalhes($id)
    {
        $arq = Arquivo::join('tags', 'tags.id', '=', 'arquivos.tag_id')
                    ->where('arquivos.id', $id)
                    ->first();

        if (!$arq)
            abort(404);

        $this->authorize('arquivos', $arq);

        $path_arq = storage_path('app/' . $arq->caminho);

        $info = (object) [
            'id' => $id,
            'titulo' => $arq->titulo,
            'extensao' => File::extension($path_arq),
            'tamanho' => File::size($path_arq),
            'carregado' => $arq->created_at->format('d/m/Y à\s H:i:s'),
            'owner' => $arq->email,
            'tag' => $arq->tag,
            'md5' => hash_file('md5', $path_arq),
            'sha256' => hash_file('sha256', $path_arq)
        ];

        return view('/painel/arquivos/detalhes', compact('info'));
    }

    public function excluir($id)
    {
        $arq = Arquivo::join('tags', 'tags.id', '=', 'arquivos.tag_id')
                    ->where('arquivos.id', $id)
                    ->first();

        if (!$arq)
            abort(404);

        $this->authorize('arquivos', $arq);
        Storage::delete($arq->caminho);
        $arq = Arquivo::find($id);
        $arq->delete();
        return redirect($this->redirect)
                    ->with(['status' => 'success', 'msg' => 'Arquivo excluido!']);
    }
}