Copy.com, like Google Drive, is a flashdrive-in-the-cloud type of service... the only difference between copy.com, Dropbox, OneDrive, Google Drive, Box, and a dozen other services, is how much storage they offer, what operating systems they support (some don't support linux), and how reliable they are. I've never been overly impressed by copy.com, as far as I am concerned their desktop syncing program is a piece of junk. It is possible it works better on Windows (where I suspect most of their users lie).
Conversely, I have always been extremely pleased with Dropbox. If you don't yet have a Dropbox account, you can use the referral link in my signature.
