Dont use unauthorized Xbox 360 Storage Devices - Xbox Live's Major Nelson
"...the Xbox 360 system update next week, one of the changes is that unauthorized Memory Units will no longer work with the Xbox 360. If you’ve moved your profile or saved games onto one to “back it up,” you’d better move it back onto an
authorized Xbox 360 storage device prior to taking the update. If you continue to use an unauthorized Memory Unit after the update, you will not be able to access your stored profile or saved games."
This was from the 16th, so I don't know how long till the update. I couldn't see a post letting x-box gamers here know so sorry if its a repeat, or if it belongs somewhere else.
-thanks for the link to stick it in the right spot AO-cheers