I have the same problem. i got a 16gb card and when i boot into android blazn 8/30 version, it couldnt find my sd card. it was after i format it for the second time that this happen. this is how i fix my problem
1. download hp sd card format tool
http://www.pscience5.net/downloads/CFP/SP27213.exe
2. format the sd card fat32 with hp tool instead of using the windows
if the card still isnt recognize then partion the card with paragon partition manager 9 or above.
3 set the partition in lowest amount my 16gb i set it at 128 or something. it was the lowest, select ext2 format for the partition.
Then you all set put all the files back and boot up and do a media scan with devtool and everything is back.