I have a Gigabyte GA-Z77X-UD4H Motherboard. It has 4 SATA III ports but 2 are Gsata and can't be used if I want to use the 2 eSATA ports on the back of my PC which I use. I also have 4 SATA II ports.
2 SATA III ports contain my SSD C drive and a 4TB hard drive for my video projects.
2 SATA II ports contain 2 Bluray drives. The other 2 contain another SSD for my personal files and another 4TB hard drive. I'm only using those ports because there isn't more Sata III ports on my motherboard.
I would like to add at least another 4 SATA III ports - ideally I want to add several more than that. I will be upgrading to a more high end motherboard in future with more ports but for now I just need a card.
Only 3 hard drives will actually be in use at any one time. C drive, Project drive, Videos for burning to Bluray.
I don't need anything fancy such as raid, etc. I simply need more SATA III ports and for them to work as normal.