I purchased a class 10 - 32 GB SD card for my Macbook Air (13' late 2011). I followed the direction of several threads here and used scissors to clip the sd card in half so it would be flush with the body. Everything worked, and has been working - with gigabytes of iPhoto data, iTunes library, and a nice storage place for my downloads, I've been having fun off loading gigabytes of data to my SD card. However, recently I run into an: "operation cannot be completed error code -50", where it wouldn't write data to the SD card but would read from it just fine. I did a verify disk which said "volume bitmap needs minor repair for under-allocation." So I repaired the disk and was immediately able to resume normal activity. Just for the heck of it, after repairing the disk, I closed my laptop lid, and opened it back up to verify disk and got another "volume bitmap needs minor repair for under-allocation." So I repaired it and this time, before shutting the lid, I ejected the SD Card via Finder and then closed the lid. I opened it back up and did a verify disk and there were no problems. Do I need to eject the SD card every time I close my laptop lid when I'm leaving it in the SD Card bay? Thanks!