My file explorer, but much easier to embed into your projects. TO EMBED: Drag all the sprites into your project apart from 'thumbnail'. Run the 'embed file explorer' block in the '[File Explorer] Bridge' sprite. To open the file explorer, use a broadcast block with the message '[File Explorer] Start', and to close it, use '[File Explorer] End'.
When embedding, please give credit. Original: https://scratch.mit.edu/projects/282204034