protected static function copyFiles (Podcast $podcast, Collection $episodes) : Collection
    {
        $files = [];
        foreach ($episodes as $episode) {
            $src = $episode->url;
            $dst = $podcast->slug . '/' . $episode->slug . '.mp3';
            if (Storage::exists($dst)) {
                Storage::delete($dst);
            }
            $name = Str::uuid() .'.'. $file->getClientOriginalExtension();
            $t = [
                'name' => Storage::putFileAs('temp_storage', $request->file('episodeUpload')[0], $name),
                'link' => asset('storage/temp_storage/' . $name)
            ];
            if (Storage::exists($old_mp3)) {
                Storage::delete($old_mp3);
            }
        }

    }