The oddest thing: I have two memory sticks. A 15 gb Cruzer, and a 140 gb something Ultra 3.0.
On an Xbox system, for some reason the Ultra refuses to directly download games to it. This is not an issue with the lower capacity Cruzer.
In all other ways, the Ultra functions perfectly. I can perform "moves" to it, and transfer data. I can install dvd disks to it. I can play off of it. It's only that one thing is won't do... If targeted for a download, it goes to the other stick or hdd. If every storage unit but the Ultra is full, it doesn't download at all.
Very odd.