That's exactly what I mean. It's great for temporary storage but a real pain to have that hanging off a mini usb port.
I think the idea is you're on a cruise/vacation and want to lay down on the bed to watch a movie and you plug in the external drive. You're not out and about watching large video files (the only real reason you need lots of storage space on a tablet). So it isn't a big deal if you have to plug in a cable and drive for that purpose.