The USB drive install (for the 2nd Disk for the X-box) is not mandatory and in fact you need to be cautious.
The game basically is so big it is split into 2 discs, you install Disc 1 and never need it again.......
Thanks Raymond.

Why on earth resist?
Join us...
I've got a HND dissertation which I've supposed to have finished by October that I haven't even started yet. I think GTA V would put paid to any attempt to redeem myself with my employer if I were to purchase just now.

Trying to convince myself to get on with the dissertation and once its done my reward will be to purchase GTA V. That way of thinking isn't really appealing/working at the mo' though.
