You can easily refotrmat it, either using fdisk or if you want a GUI, use gparted.
With fdisk (also you can use cfdisk) I suggest first to delete all partitions, then create new one. Then choose your type (it is 0b for FAT32). Write to disk and quit fdisk. Then format the new partition, for vfat use: mkfs.vfat /dev/sdc1 (or whatever your partition is). Everything must be done as root (of course) so be carefull. Hope this helps. Best Hans
