I plugged it in etc, turned my computer back on, and W7 isn't recognizing it on my computer. I have several other HDDs/SSDs in my computer that were recognized right after plugging them in. Did I do something wrong, or is there something else I am supposed to do?
I have it plugged in to one of the 3.0GB/s because the Marvell ports don't recognize anything.
If all cables are firmly connected, and it is seen in BIOS, use the Control Panel menu to start Computer Managment and use disk management to initialize/format the new HDD, it should then be seen in My Computer.