The hard drive in my 2010 Core 2 Duo iMac is 500 GB. I'd like to upgrade it to 1-3 TB for photo and video storage. Any suggestions or any to stay away from? Will any standard 3.5" SATA work? I'll need to from 4 GB>>>8 GB memory also. But do I recall that Snow Leopard can't be upgraded to Mountain Lion? That could be a negative. Yep, it's a dinosaur but it's paid for and works fine. Plus, I still like having the internal OD. Thanks much.