I'm trying to use parted in the most basic way: format an external USB hard drive as ext2 (ideally ext4 but didn't seem like an option). It is 3TB and unmounted at /dev/sdd
sudo parted /dev/sdd mklabel [type gpt] [type yes to agree that everything on that hard drive will be lost] mkpart [type myDefaultPartitionName] [type what for Start? prompt]
After I can get past that, how do I know what to type for end?