I upgraded the memory in my 13" MacBook Pro (Mid-2010) from 4GB to 8GB using the Kingston chip from buy.com: http://www.buy.com/prod/kingston-ap...z-sodimm-c7-imac-and/q/loc/101/220206967.html I powered back on, it shows 8GB under Memory in the About This Mac settings. Everything seems to be working fine, but I just noticed my Finder shows 1.7GB of storage available. Before I had around 5.8GB free. I've restarted the computer, and the trash can is empty. What happened to the 4.0GB? At the risk of sounding like an idiot, did the 4GB upgrade in memory come from a 4GB sacrifice in storage? I read the instructions on memory upgrade from Apple's support page, but there was no mention of anything other than unscrewing the back, replacing the chips, then screwing it back on.