I have no idea if this has anything at all to do with it, but I did notice skymap was the only app on my phone that installed itself to the sd card after the update. Perhaps try moving it to the phone first if this happened to you too.
not sure about that. i has a micro sd to normal sd adapter, and i stuck it in my laptop to format / backup. I'm assuming you could use the usb cord, and mount in via usb to do the same thing.