[quote name='shieryda']Are there any advantages of using a USB flash drive for dlc, game saves, etc. if you still have space on your console's hdd?[/QUOTE]
One nice thing is you can move your profile and saves onto the flash drive and then if you visit friends/family you can take that with you and play games with your saves. At least I think that is possible. Truthfully I'm a newb and haven't been able to test yet if this actually works. I do have my profile on my flash drive, and I have some of my saves on there. I think you can also put XBLA games on the flash drive and as long as you have your profile on there too, and log in on the other console, you can play the XBLA games. I'm not really sure about that, though.
As backup, though, it's actually a real pain to do, especially if you have multiple profiles on your drive and/or you install DVD games to the hard drive. That's because you can't then just select a game and say to copy everything for that game to the flash drive. If you've got an installed DVD game it will complain and not work. So you have to go one level deepr and then copy each file individually. Major pain depending on the game. If you have multiple profiles and saves from other profiles as well as from your own, you'll have to copy the saves from each individual profile - you can't copy everybody's saves at once. You have to copy your saves, then switch profiles and copy that profiles saves, etc. In general, most of the time I seem to have to copy individual files. End result is it isn't practical to use as a backup, at least not as a good one. You'll do it once, maybe, but I doubt you'll keep the backups up to date. Not even close.