I am interested in upgrading my plan to the 2TB plan because I need to backup an external hard drive (WD-My Book for Mac) with approximately 600GB of old iPhoto files on it. I cannot upgrade until I know that Dropbox Backup can access and backup this drive. When I go to the Dropbox Backup section of the app, it only gives my Mac hard drive as an option even though the external hard drive is connected and viewable/accessible in Finder. The FAQ section of Dropbox support says that it supports only certain types of external hard drives but I don't know what those drive types mean nor can I tell whether my external drive is one of those types. I contacted Dropbox sales support and they can answer my question and they can't get me any tech support (makes me question whether I want to stick with Dropbox anyway but that's another issue altogether). If I can't backup this drive through Dropbox Backup then I am not going to upgrade. My free plan is enough for what I need otherwise.
Can anyone help me figure out whether Dropbox Backup can back up my external drive and help me see it on the Dropbox Backup screen in the app?