Inside the world of guide dog dropouts (2019)
26
votes
Guide can be found here
Right now, the guide assumes you aren't dual booting. This is because I've never really dual booted off a single HDD, so while I probably could include it in the guide, I don't feel comfortable without first testing the process.
This guide also sets you up with BTRFS, but you can still use ext4, just requires changing two lines.