I asked Geek Squad at BB about this but they had no idea how to set this up: In a nutshell, I want a Time Machine-like function for my external HD, however it only backs up certain folders. And doesn't do it in the Mac-only Journal style (I'd prefer FAT32). My ultimate goal is to have my external HD plugged into my AEBS and have the ability to back up my media (Music, Movies, Pictures) and Documents folders without having duplicates, and for my PC and Dell laptop that my parents use to be able to access it. I understand that I can simply File Share but I'd rather have the portability if I ever need to loan the external to somebody. Any suggestions/ideas? I'm not really willing to shell out much cash for a program that does this for me, but I welcome the suggestions of them anyway in case they seem worth it.