I have tried searching for answers but got terribly confused. So for that reason I'd like to post my specific question and maybe someone can help me: I am currently using dropbox, mostly for automated mobile backups of my Macbook Air. But I'd like to move away from it for security (privacy) concerns as well as for more space. I have a Fritz Box 7490 router with USB inputs and a WD Elements 500GB external mobile hard drive that I am not using. Can I connect the hard drive to the router and use it like I use dropbox now? Is it as reliable/fast? Can such a drive run 24/7 connected to the router? Is there something I am not thinking of?