I've always religiously un-mounted an external drive / USB stick correctly. I'm getting lazy and wondered if i could provoke data loss or even damage if i just yank the USB cable out if my mba is on / sleeping. The drive has all of my videos / lossless music so i use it to stream to airport express and apple tv. It also does my time machine backups. If the mba is sleeping could i pull out the USB cable without data loss?