So, last night I installed a SanDisk Extreme 128GB microSD card into my SDXC slot. Did a VHD mount, and migrated all my Dropbox data to it. As I am using it today, I seem to be getting this error over and over, at all random times: What the heck is this?!? I am also noticing a significant drop in speed whilst using the SDcard, rather than the native SSD. I think I may just take the GB hit and re-migrate all my data back to the SSD, for optimal performance, and keep the SD drive as a 'trash drive' or download drive... hrrrmph.. Damnit!!! EDIT: BTW, once I manually remove and re-insert the micro card, the problem is remedied, so it's an easy fix, but I don't want to have to keep doing this over and over.