Hello, this kind of question has probably asked 100 times but I couldn't find a post that helped me. I've also read the "SSD Buying Guide" but it didn't help me either. I want to replace my Macbook Pro (late 2011)'s optical drive with an SSD. So far, I've found out that I need kind of an adapter so that the SSD fits into my MacBook Pro. Ifitit offers such an adapter for about $60 (including shipping excluding taxes) which is kind of much but I would buy it if necessary. I will probably buy Samsung's 840 EVO SSD unless you wouldn't recommend it at all. So far, I've come to 3 problems: 1. On Amazon, there are 3 options of my SSD: Basic, Desktop Kit, Laptop Kit. Where are the differences (except the price) 2. Will the SSD mentioned above fit into ifitit's "SSD Adapter" (I have no idea how to call it, sorry). 3. Is there another, cheaper version of the adapter? On amazon I only found some that had bad reviews. I would prefer to buy it on Amazon since taxes and shipping is included. Taxes can be a hassle because I live in Austria, so I'd prefer them to be included, which amazon always shows. If you only find an adapter in the US Amazon store, don't worry, I will likely find it in the Austria (German) store as well.