Here’s a structured for a Fallout 3 (Xbox 360) save editor — designed for modded/horizons/resigner use (extracted *.dat or *.fos ).
Xbox 360 save files can be transferred to a computer using a memory unit or an Xbox 360 USB storage device. You'll need software like Horizon or Xbox 360 Save Manager to extract and manage your saves. fallout 3 xbox 360 save editor
You can still do it via the "Cloud Transfer Method." feature set Here’s a structured for a Fallout
A: Yes, with conversion. Rename the PC .fos file to match Xbox naming, then use Horizon to resign it. There may be texture issues due to compression differences. On Xbox 360 dashboard → Settings → Storage