documentation/docs/void-desktop-setup/Provisioning.md

First off the drive should be partitioned, possibly with fdisk or cfdisk. It should have atleast two partitions with one EFI System Partition and one Linux filesystem partition.

It should look something like this:

Number of partition	Size	Type
1	1 to 2 GB or more	EFI System
2	Rest of the drive	Linux filesystem

Then to create the filesystem of the efi partition.

# mkfs.fat -F 32 -n efi /dev/<disk1>

And the encrypted filesystem of the root partition.

# cryptsetup luksFormat /dev/<disk2> --type luks2 --label luks
# cryptsetup open --type luks /dev/<disk2> root
# mkfs.ext4 -L root /dev/mapper/root

Other filesystems can also be used but ext4 is the standard for most linux distobutions.