I am very gradually undertaking rewriting the documentation at easyos.org. Started with this:
https://easyos.org/user/how-to-update-easyos.html
Today, have completely rewritten this page:
https://easyos.org/install/how-to-insta ... w-ssd.html
The title says "SSD", as that was the original case-study in 2019. However, the instructions apply to any drive; internal or external, SSD, HDD, Flash-stick, or SD-card. maximum size 2TB.