Installing Hard Drives for MPC1000

Having problems with my Memory Card Slot driver I ended up willing to get a hard drive for my baby, my MPC1000! That is thanks to you guys! You cheered me up

I know which drives fit for MPC1000 but there are two tipes: 3.5 inch and 2.5 inch! Who is the right one?? I opened my MPC and discovered that theres is not much space dedicated to the hard drive! Normal PC hard drives ar much bigger in space! Can you kill my doubts?? Can you tell me the truth about all this??

2.5

Don't forget, you need the hard-drive adaptor to fit a hard disk in, you can't just shove a hard drive in there. It's not expensive though.

Hard Drive Adapter HDM-10 = 29.00 online.