(Cruzer 64GB) How do I change Volume Format?

I am gettting an error message transferring 4GB size files onto my Cruzer 64GB: “File can’t be copied because it is too large for the volume’s format.” How do I change volume format?

The drive comes from the factory formated as exFAT which handles files larger than 4 GB.  It seems someone reformated the drive to FAT32 which does not support files larger than 4 GB.