With my windows machines when ever I did an upgrade to my machine, I usually wiped the drive or just installed a new HDD and re-installed windows on the new drive. This was back in the day before recovery partitions where made on prebuilt machines, you know, when they came with a physical disc, albeit a recovery disk. When I built my windows boxes, I just bought the OS to go with it. Now if you change too much hardware you need to call microsoft. Anyway, I know a recovery partition is on my 13" MBP. If I pull the drive out, well I can't access the partition. So, that leaves me to question: If I chose to install this 128gb crucial SSD drive into my MBP, will I need to buy lion on a thumb drive? 70 bucks is not bad, Microsoft wants 200 bucks for home premium full Or is there a plan B that I can use? I suppose either way I am looking to spend some money to swap out my drives. The good thing is, I don't have hardly anything saved to my MBP. I DO have an external HDD dock and can come up with a spare 2tb drive (its pretty much empty) I can use to move stuff around. I don't have a time machine, but I suppose I can back up to the external HDD. I don't have much of a problem buying lion on a thumb drive. Though I do wonder if this will cause an issue when mountain lion is released, I am sure I would have to pay for an upgrade anyway.