Ah, yes sorry I missed the fist column which is your total size. I usually use df -h so that format is a little different than what I am used to. If you have no need for logs you can set up a cron job to delete all log files every hour until this is fixed.
First switch to root user to avoid permission issues: sudo su
Then create the cron job: crontab -l | { cat; echo “0 * * * * rm /var/log/myDevices.log*”; } | crontab -
After that type in exit to get back to your regular pi account and you’re good to go.
To delete the cron job switch back to the root account with sudo su and use the command crontab -e then delete the line we added and save it.