1 GB space left, even after formatting a 16 GB flash drive? [duplicate]
Run Computer Management -> Storage -> Disk Management and find the drive in the list. Delete the existing partition and then create a new primary partition formatted as FAT32.
Does this have it's own software on it? I know some do. If not, or if you don't care, use a linux liveCD to use gparted or cfdisk to format the partition table and everything. If that doesn't work, then do dd if=/dev/zero of=/dev/sdb to overwrite it bit for bit with zeros. Then use gparted or cfdisk to add a partition table to it.