The fly-by-wire syncing method (between the HDD and XBox Live) eliminates the possibility of doing mods with characters. For example, you can’t create a new profile character on a USB or other external HDD and use it to get a mission weapon, then dashboard out and quit with the main character then go back to the game’s HDD and redo the mission for 2nd, 3rd weapons. Say you want more than one Sand Hawk, then you will have to replay the game. The ability to redo missions would be a nice feature in new releases of GBX software for the XBox One platform.
what happens if you just disconnect from xbox live?
I couldn’t get it to work offline either. If you can, let me know how you did it.