hm.. it seems like i have been ripped of then :/ at this point im glad it has 8 gb of anything
sadly, you may still be wrong. plug it into your linux desktop and do the following
* unmount the flash card, something like
umount /dev/sdd1
* determine how many blocks of storage the card says it has
fdisk -l /dev/sdd
* create a file that many blocks of random data where NNNN is the block count
dd if=/dev/urandom of=/tmp/bigrandomfile bs=512 count=NNNN
* fill the card with that data
cat /tmp/bigrandomfile > /dev/sdd
* then verify the card hasn't lost/corrupted the data using md5
md5sum /tmp/bigrandomfile /dev/sdd
when you've finished, use "fdisk /dev/sdd" to put a new partition on the card, be sure to set the partition type to LBA FAT32, then "mkfs.vfat /dev/sdd1".
Hope this yields good news results!