If you have a potentially (probably) dying SSD with BTRFS on it, would you rather:
1. Try to copy out data first
2. Try to use BTRFS repair utilities first, and then try to copy data
For reference this is from a used Thinkpad X390 which lately has been running extremely slowly and now not being able to boot properly (not reaching login screen). btrfs check found some errors (but FS was in use), UEFI diagnostic found no errors with the disk nor other hardware.