"Your storage is full, files can not be updated or synced anymore!"

Nextcloud version (eg, 20.0.5): 20.0.7
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04.2
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.41
PHP version (eg, 7.4): 7.4.3

The issue you are facing:
“Your storage is full, files can not be updated or synced anymore!” Error.

No quota set for users.

I used the appliance to deploy and data is mounted via, /mnt/ncdata. That data drive has 300GB allocated to it from ESXi, however, ncdata shows as 107GB, with 0GB available. As I clean up files from my user accounts, the ncdata size decreases, but no space is freed up to be available.

df-h