If you have autodefrag settings in /etc/fstab try to remove it.
Make backup before editing fstab file: sudo cp /etc/fstab /etc/fstab.bak
Once you have removed autodefrag part, run sudo mount -a to check that there are no invalid entries in the fstab file. And then reboot just in case.
About that Baloo eating resources.
Are you using Timeshift?