Check your old Xbox 360 hard drives. Look for the green "Add-on" folders. If you find a strange 1MB file dated 2013 named TU_15_Online_Pass , do not delete it. Upload it.
: Large datasets are often split into manageable "parts" (e.g., Part 1, Part 2, Part 3) due to the sheer size of the Xbox 360 library, which includes thousands of individual add-ons. Missing Content Xbox 360 Dlc Archive Part 3
Preservationists continue to search for missing items that were never archived before the store closure, specifically focusing on: Check your old Xbox 360 hard drives