Even though it says my review is for the 32gb version it's for the 64gb. Not sure why it says 32gb above.I received this card to use in my 2013 MacBook Air for extra storage. I liked that the speeds were up to 30 MB/s. I figured there would be a little bit of a fudge factor but not this much.While I can consistently get almost 45 MB/s read speeds, the write speeds were only around 10.5 MB/s.I guess you could average these together but I don't think that's really the point. :-)I didn't see a review that dealt with this specifically so hopefully this will help someone else out in the future.Update: Only now did I go back and read the tiny print that "Write speeds may be slower". Well, that is obvious now but I think 1/4 of the speed is a lot slower.