Do need help with this. ASAP!!
Can't read the update from your storage device. Please reinsert it to continue the update.
If the problem persists, visit Microsoft Xbox Support | Xbox 360, Xbox LIVE, Kinect, and Games for Windows - Xbo*****m.
Status Code: 335A-351F-B680-0F00-C000-0034
Whenever I reinsert my USB flash drive it gives the same error. Whenever I restart my xbox it doesn't go to my dashboard, it's just stuck at the update. 
@Disturbed HALP!!! 
Went on the xbox website and that error says to contact them :\
I remember seeing something a while back, if you get update errors.. go and clean out the cache and something else on the xbox to reset it