Im wondering if i can put a second hard drive in my Dell Optiplex 960 MT. I'm out of room on the stock one. If so, what are the requirements for the HDD?
The Dell Optiplex 960 has 2 internal 3.5" drive bays. If you only have 1 hard drive installed then you have room for another.
The only requirements for the hard drive is that if the capacity is larger than 2TB then you can't use it as a O/S (boot) drive. You would only be able to use it as a secondary/storage drive.