The card is totally toast it now after a reformat its down to 995KB I kid you not!!!!!!!!!!!!!!!!!!!!  I did get a full refund and didnt have to send it back to I basically got a free micro sd adapter and sd usb reader. Ill by a name brand 32gb card and be done with it. Thanks for the great posts

The NEX support NTFS, formatting SDXC cards in NTFS should not be a problem at all, being a part time photographer I have several SDXC cards have been rewritten hundreds of times for photography purpose and camcorder over the last few years without any corruption or ill effect.  If your SDXC card died it's most likely due to defects, which could also happen to CF card, USB flash drive, or any other portable storage devices.

I'm using a 1TB buffalo portable hard drive in USB 1 (albeit its only 500gb usable) but it works fine for music photo and video files. No issues whatsoever on the 8100 it reads fairly fast to for the initial load time. The avics seem to like either fat32 or ntfs file systems only!! Hint hint....