Xbox 360 File Manager ^new^ -

For "full trust" access to internal partitions, PC-based utilities are the most reliable method for managing Xbox 360 drives. 360 Content Manager - ConsoleMods Wiki

The most modern and popular custom dashboard for the Xbox 360. It includes a built-in, user-friendly file manager that supports multi-tasking (copying files in the background) and can automatically scan for and add games to your library. xbox 360 file manager

If you are a casual user who only plays retail discs, you likely don’t need a file manager. However, for the power user, a file manager is indispensable for several reasons: For "full trust" access to internal partitions, PC-based