I have a 2012 mini that I find brutally slow now that I have an iMac 5K. I had only 4g of ram and tried to upgrade the unit for Yosemite, and it didn't like it. The mac would lock up on wakeup and things would beachball lock up. So I found a way to go back to Maverick by doing an internet recovery. Sadly that didn't go as well as planned. I lost the recovery partition on the mac, and things are not running as fast as they were. I have upgraded the machine to 16gb ram now but it still seems sluggish. I was thinking that for $150 I could get a 256gb SSD and a USB3 case. (or for $45 more get a 512gb SSD) Is there any down side to effectively wipe the internal drive and just go external with an SSD?