Item description:

Xbox:
Plug USB into xbox
Press RB until you go to settings
Press A on System
Go to Storage
Configure USB (if not already done)
Go yo your HDD
Move your XBL account to your usb

Computer:
Plug USB into your Computer
Open Horizon
Go to Device Explorer
Click on Gamer Profiles
Drag your profile bottom right
drag in the modded save top left
Copy Profile ID, Device ID, Console ID from your account and paste it into the corresponding boxes
Save, Rehash and Resign
Save to device
Device Explorer
Open the modded save
Save, Rehash and Resign it again

Xbox:
Plug USB in
Press RB until Settings
Click A on System
Go to Storage
Memory Unit
Move your Account and Modded Save Over

Happy Modding :)