I have an S7, a MacBook Pro (OS X 10.9.2) and a 128GB SanDisk microSD (w/ adapter) and am having some problems. If I format the microSD on the MacBook and transfer files over, things run smoothly and the files seem to be picked up by apps when the card is inserted into the S7. However, if I take the microSD out of the S7 and try to transfer some more files over, I run into read/write errors (error -36 in particular). No files show up on the microSD in Finder, even though Get Info correctly displays that some space on the microSD is taken up. The same thing happens if I format the microSD using the S7 and then try to transfer files after inserting it into the MacBook. Long story short: as soon as the microSD interacts with the S7, this stops it from working properly with the MacBook. Any advice much appreciated - sorry if there's relevant information that I've left out.