Support What the heck should I backup now?

view story

http://androidforums.com – The storage organization of 4.2 is confusing the heck out of me: I see that /sdcard is no longer a mountpoint, but a symlink to /storage/emulated/legacy. I've been backing up /sdcard, if I start backing up /storage/emulated/legacy instead will that get all the same stuff backed up? There are a lot of other mysterious mountpoints to device mapper stuff as well, almost like every app has its own mountpoint. I have no idea what that is about. (General)