I was wondering what would be the largest HD i could put in my xbox. Any help would be helpfull. Thank you

Its Around 2 Terabytes.

Ok so would i need a special bios or any thing like that?

your not putting a terabyte hard drive in the xbox. youd need like 8 extra partitions because data corrupts after 250gb. also i think the bios only supports up to 400. plus 2 tb hard drive is prolly around thousands.

as if they exist, lol

with the current version of xbpartioner and the current crop of bioses you could do up to 1tb (on F+G), and with a simple change to the code of xbpartioner (to allow 64k clusters) you could do up to 2tb (F+G again)

thank you very much