Shopper has a full-fledged Media Manager which allows you to upload files, re-name files, and delete files. You can also add new folders and move files/folders. Basically anything that you would be able to do in any type of Media Manager you can do so in the Shopper Media Manager.
Notice on File Upload Size
If you are getting an error when trying to upload large files, this may be a setting that needs to be changed in your PHP. Be sure to check