My iMac is slowing down and I wanted to upgrade the RAM and upgrade to Snow Leopard from Tiger. Here are the specs: Version 10.4.11 Processor: 2 GHz Intel Core 2 Duo Memory: 1GB 667 MHz DDR2 SDRAM I want to back it up before I upgrade to Snow Leopard. What external hard drive do you recommend? The only things that I want to put on it are my pictures from iPhoto and music from iTunes. I have 12GBs of music and 1,109 pictures in iPhoto. Also, how do I go about getting these things onto the external hard drive? Will it mount on the desktop and then I just drag my files into it? Sorry for all the questions. Thanks in advance!