Newb question for a long time Ubuntu user but I am having a problem with the occasional folder being moved or deleted or even Thunar's Bookmarks disappearing on me.

I'd like to be the only admin on my machine WHILE allowing other users to copy files from the computer to say their MP3 players etc. I don't mind if they download new files but I would like to be the only one to change folder structures or DELETE files.

Is this possible?