This question is inspired to: What kind of SSD is compatible with the 2010 Unibody MacBook?
I am reading here, MacBook Pro (13-inch, Mid 2010) - Technical Specifications that the suggested SSD are 128GB, 256GB, or 512GB solid-state drive.
Is there any problem if I buy a 240 GB which seems to be easier to find? Someone in the first link even says we can buy up to 2TB. I'm asking because I am having problems in finding 256GB, so I'm worried about compatibility with 240GB.