This happened on my 2011 11" MBA i7 After working on a word 2011 file for the entire day, when i tried to save it i couldn't. keep getting this error message: "A file error has occurred. Check your network connections or make sure the disk is properly inserted and not defective." I am not using any network or external drives, the word file was on my desktop and i was saving it to the same file on the desktop. Had even tried to paste it to another new document and save, but that failed to save as well. Would this be a problem with my SSD drive? Lion? Or was it buggy programming by MS? anyhow, how do i check the performance and health of my SSD?