Pendrives often contain customer, personal or other sensitive data. Now that GDPR is on us, it’s high time to protect those pendrives. The following example assumes that your pendrive is /dev/sdb, and you have a Linux partition on it (/dev/sdb1).

Format the device:
cryptsetup luksFormat /dev/sdb1

Open it:
cryptsetup luksOpen /dev/sdb1 pendrive

Create a filesystem:
mkfs.ext4 /dev/mapper/pendrive

Create a directory where we can mount it:
mkdir /mnt/pendrive

And finally mount the pendrive:
mount /dev/mapper/pendrive /mnt/pendrive