Hi.

I would like to upgrade my hard drive from the original Seagate 750gb 7200rpm sata II to Kingston HyperX Savage SSD 240GB for OS and Western Digital Black Mobile 750GB sata III (WD7500BPKX) for second HDD. Will these work in my system? And would I void my warranty if I change it? And could I use the old HDD as portable HDD or do nothing with it?

I'm from Slovakia if that maters for the warranty.

Thanks for answers.