Chosen Solution

Can I upgrade my hard disk raplacing it whit an SSD only following the replace hard drive’s guide on ifixit?

Sure, just make sure to use the jumper pins to take it down to 1.5 GHz if disk utilities won’t see it.

I’ve done this with an ocz agility 3, works fine at SATA III (6Gbs).

i have ssd samsung SM841n function perfect