Volumio on RPI3 overlay 100%

Hello,
On my volumio 3.251, i use rclone to sync my music from Gdrive to my usb drive connected to my Raspberry. I don’t know if it’s related but my my overlay is stuck a 100% and i have no idea how to clean up.
I have already change the default cache folder for rclone to set it up in the usb drive.

volumio@volumio:~$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mmcblk0p2 2.5G 425M 1.9G 19% /imgpart
/dev/loop0 364M 364M 0 100% /static
overlay 4.6G 4.6G 0 100% /
devtmpfs 445M 0 445M 0% /dev
tmpfs 484M 0 484M 0% /dev/shm
tmpfs 484M 9.0M 475M 2% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 484M 0 484M 0% /sys/fs/cgroup
tmpfs 484M 4.0K 484M 1% /tmp
tmpfs 20M 188K 20M 1% /var/log
tmpfs 484M 0 484M 0% /var/spool/cups
tmpfs 484M 0 484M 0% /var/spool/cups/tmp
/dev/mmcblk0p1 92M 54M 38M 59% /boot
tmpfs 97M 0 97M 0% /run/user/1000