obv you cnt increase but i have 750gb sata laptop hdd and want to swap my current but need to format it so the xbox recognises it cuz seen tut b4
The highest you can go to is 320GB as the HDD bios that you flash onto said drive is from the LE slims Also you have to make sure it's a 2.5" Western Digital BEVS/BEKT, others don't work and tbh for what you get, doing it all is such a pain in the rear if it doesn't work 100% straight away (like mine did)
amazon are selling phat 320 gb for £50 and slim 320gb £35.88 easier then messing with the ss bin on a hdd that is compatible.and if your hdd is compatible you can still only get 320 out of the 750 gb so it would be a waste of a hdd you could buy the slim 320 gb and open up a old hdd case for phat and replace the hdd insid. i have done this with 250gb slim to a old 20gb phat