I was wondering if anyone had had any success storing their Dropbox folder on one of these expansion cards? I have one for my MacBook Pro and would love to keep a rather large Dropbox folder on there but when I try to I get an error message saying that some files can't be moved, please select a new location or close some files and try again. I have closed files and rebooted but still get the error. Might it help if I tried to reformat the JetDrive?