Hi, Thanks for having me on the forum!! I have recently bought two retina MBP 13" (late 2012's) with the SSDs removed (for sec. reasons). I am now trying to replace the missing SSDs with original MBP parts but have found it hard to find original SSDs for the 13" MBP. What I have found are plenty of 15" ret. SSDs for sale - which would suit me. My question is, despite the fact that they are installed differently are the SSDs cross compatible, regardless as to whether it fits in a caddy or attaches directly to the LB? Any advice on this would be greatly appreciated as I can't seem to find consistent answers! Thanks again in advance. Will Update: I have this which claims that the SSDs are compatible with sister/brother models can anyone else confirm please?