Allow users access to their own Files:
Manage > User Settings > Access to own Files. You can set to OFF, View Only, Upload Only, View and Upload, and All Access. Click here to learn more.
Categories: If you no longer need a Category, remove all the files from that Category and it will be deleted.
Max File size upload is 25M
TIP: Use your phone to upload files easily! Just browse to any upload section on your phone or tablet, like Files, and choose upload, from Camera or Camera Roll. Easy!