Open a USB drive on OpenBSD

For the record.

Find out the device name of the usb with (e.g., sd1):

sysctl hw.disknames

Then find out the name of the partition you want to mount with (e.g., i):

disklabel sd0

Then create a mount point (a folder that is linked to the partition you're mounting):

mkdir /mnt/foo

Then mount the partition at that location (e.g., sd1i):

mount /dev/sd1i /mnt/foo

To remove your flash drive, run:

umount /mnt/foo