A friend of my sister's is having a problem with her drive. The way it was acting, I thought for sure that the logic board was bad. When I used Scannerz to troubleshoot a problem with my SSD, they had me create a Phoenix drive on a USB flash drive, so I just plugged that into her system and tested it. I thought for sure it was going to tell me the logic board was bad or something like that, but instead it found a bunch of bad sectors in the first few gigabytes, which is where I guess most of the OS is, which I guess also explains why the system was crashing on boot. In any case, the drive is definitely bad and needs to be replaced. I tried to talk her into an SSD but she has tons, and I mean TONS of video, pictures, and music on it so I'm figuring she needs at least 500GB. I know some others on this site are recommending some type of new Hitachi HDs that are pretty cheap, but I was thinking, especially since she's thinking about moving to Yosemite, that maybe a hybrid HD would do the trick. Here are some questions: I seem to remember seeing somewhere that even though the drive is 2.5" drive, it might be too fat to fit in some systems. Is this a problem for MacBook Pro's or not. I think this might be a problem with some MacBook's but I'm not sure it's a problem with Pro's. How fast are hybrids in reality. I obviously don't expect it to be as fast as an SSD, but how much faster is it really than a regular hard drive. The new Hitachi's are supposed to be lightning fast for hard drives, but will the hybrid be noticably faster for the price difference. Recommendations, anyone??? Thanks in advance!