Filesystem management

Hello everyone, I want to create some folders in my app and give permission to my users to uploads file in this folders, based on your id, to make a relation user->file , where I have to start? I review config/filesystems.php and see that the default is local pointing to ('app') folder, is that rigth ? How i could display the tree folder view , so that users can select the folder and store your information in folders.

Thanks a lot

Greetings