Official DigitalOcean docs were a bit too lengthy for me.
So this is a much simpler, and quicker guide for creating, formatting and mounting new DigitalOcean volumes, with step-by-step copy/paste instructions.
Replace all instances of “new-do-volume” with assigned name of your volume.
Step 1. Format the volume with ext4;
sudo mkfs.ext4 -F /dev/disk/by-id/scsi-0DO_Volume_new-do-volume
Step 2. Create a mount point wherever you want;
sudo mkdir -p /mnt/volume
Step 3. Mount the volume;
sudo mount -o discard,defaults /dev/disk/by-id/scsi-0DO_Volume_new-do-volume/mnt/volume
Step 4. Change fstab so the volume will be mounted after a reboot;
echo /dev/disk/by-id/scsi-0DO_Volume_new-do-volume /mnt/volume ext4 defaults,nofail,discard 0 0 | sudo tee -a /etc/fstab
Step 5. Change ownership as desired;
sudo chown -R user:user /mnt/volume
The volume is now accessible at /mnt/volume or wherever you want to place it, and you are able to write files and store data as user and group settings permit.
Done! Enjoy DigitalOcean.