I need to be able to sync and share multiple TB drives on multiple computers. Say I'm working on a bunch of Pro Tools sessions during the day and in the process, alter tons of files on several 2TB drives. At the end of the work day I'd like to be able to hit a "Sync Now!" button, then leave and when I get home, log in online and be able sync that day's changes with my local drive. (i.e. not have a client running in the background uploading every change I make in real time). Also, I need to grant and control access privileges to various users. Suggestions for a service? Backblaze seems more pure data loss prevention... Dropbox has a real time client and isn't suited for entire drives... Maybe box.com?