I haven't used Apple products in almost 20 years (since high school). My company uses PC, but the owner has switched to Mac, and has requested my assistance....most of the tasks he wanted accomplished I have been able to figure out, however, every time he clicks on a file, (picture, video, download, etc) it saves a copy of it...if he opens a file 5 times, it saves it 5 times. Is this something that can be fixed in "preferences", or is it a characteristic of Mac? Any help or advice would be greatly appreciated!