Sources (March 2025):
- https://www.youtube.com/watch?v=o-3_ZlvsZAI (grub for ext4 @ ~1h24)
- https://btrfs.readthedocs.io/en/latest/Compression.html
- https://btrfs.readthedocs.io/en/latest/btrfs-device.html
- https://www.lorenzobettini.it/2022/10/timeshift-and-grub-btrfs-in-ubuntu/
Important
these steps worked for me! your milage may vary! \