Comment by Kamil Maciorowski on My Internal hard drive became write-protected, cannot download files, need to write-enable

(1) What is the output of sudo dmesg | grep sda2? (2) fsck.btrfs is a no-op (see man fsck.btrfs). There is btrfs check (see man btrfs-check), but first I would check the health of the device itself; so… (3) What is the output of sudo smartctl -x /dev/sda?