If you are using an unofficial memory unit with your Xbox 360 then you had better back up your data onto an authorised Microsoft 360 storage device quick sharp, as the next 360 update will shut-out third party devices from working with your console.
The new update is set to add a range of new features to your Microsoft console, including Last.fm, Facebook, Twitter and more.
Major Nelson advises
Xbox Live's Major Nelson blogs: "When Preview Program members start receiving 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.
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"If you continue to use an unauthorised Memory Unit after the update, you will not be able to access your stored profile or saved games."
So there you go. Consider yourself 'advised'...