You seem to be mixing up the instructions:
Start again:
Make sure /dev/sdb is the correct drive.
then as it is a GPT
You may need to install parted
post the returned to see if the partitions are as expected
Quote# mkdir /dev/sdb2 /mnt/EFIWhere did you get that?
Start again:
Code Select
sudo fdisk -l
Make sure /dev/sdb is the correct drive.
then as it is a GPT
You may need to install parted
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sudo apt install parted
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sudo parted /dev/sdb print
post the returned to see if the partitions are as expected