Yay,good news,ps2 for everybody. ------------------------------------------ You can add a HDD in 2 ways :IDE or USB With IDE you get a great compatibility,with USB it's crappy,crappy. You can add an IDE HDD to slims too by soldering a special cable on the ps2 motherboard and connecting it to the HDD. There's even a special casefor HDD enclosure. But it will only work on V12 and V3 (700xx series). The ones on the market now are 75004,V14 model,you can't connect an IDE HDD on them.