I was thinking about trading my 360 in towards an xbox one and was wondering if I need to hold onto my hard drive. Will I need the hard drive to transfer over my profile to the Xbox one.
No,you can just download your profile to the new console.
None of the games or dlc will work on the xbox one so it will not be transferable.
For the amount you would get in trade in value,you would basically be giving your console away,i would keep it.
If you do trade it in be sure to format the hard drive first to clear all your info.
Thank you for the reply