If you do go ahead and fire up your old Xbox, it would probably be worth you running XCAT.
> Xbox Content Archive Tool (XCAT) is a utility that runs directly on an Xbox console to
assist in finding unarchived DLC and other lost content. When run, the application will
scan the Xbox hard drive for any content that has yet to be archived and upload it
directly to the servers of the XCAT Team for later analysis, sorting, and archival.
> Xbox Content Archive Tool (XCAT) is a utility that runs directly on an Xbox console to assist in finding unarchived DLC and other lost content. When run, the application will scan the Xbox hard drive for any content that has yet to be archived and upload it directly to the servers of the XCAT Team for later analysis, sorting, and archival.
https://consolemods.org/wiki/Xbox:XCAT