I have a 640 GB HDD in a 4 year old HP that only accepts 3GB/s. I need more space and I also know a new computer is coming at some point. My boot drive is a 120GB Intel X-25 SSD. The current HDD was the HDD that came with the computer, is still bootable under Windows 7 and I have image backups of the partitions which I would use to transfer the old to the new.
So, if I get a SATA 3 drive that will normally run 6GB/s with 2 TB of memory, would I be able to slap it into whatever new machine I get if I get a 256 GB or 512 GB SSD as the only drive at purchase and then add the proposed drive and have it run at 6GB/s?