Folders to your liking, icons just like the ones on your computer, together with all the common controls, you already know. Haven't you always dreamed of a system like this? It even calculates the file sizes just like you'd like it to - as the size rises, the units change from bytes to megabytes so you don't have to recalculate the values yourself.
EditationYou'd think - not much to editation of a file, is it? Well, actually, it is. All the fantastic things through the whole system available also here. Relations, metadata, and .. wait, there's security! You can allow groups and single users to download a specific file and refuse to provide it to the others.
And if you ask, no, there's no way to programmatically and automatically download the whole file tree - it's hashed and encrypted by 256bit key. No checking of existing files by increasing an identification number or other hacks!