Usually I only use 2 types to partition an USB drive, UFS or Fat32.
For UFS2 you run the following where da0 is your USB drive.
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gpart destroy -F da0 gpart create -s gpt da0 gpart add -t freebsd-ufs da0 newfs /dev/da0p1 |
And for FAT32 you almost run the same commands.
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gpart destroy -F da0 gpart create -s mbr da0 gpart add -t fat32 da0 newfs_msdos -L FILES -F 32 /dev/da0s1 |
Notice that you can change the label of the drive to your own preferred name.