Utilização 100% ncdata

I use Nextcloud version 26.0.2, and it has always been very good. However, today the file synchronization stopped due to lack of disk space. I have space on the physical disk, I increased it on the VM on Proxmox, but it doesn’t work on Nextcloud. Even deleting files, the file space does not increase. On the contrary: the space used in percentage remains at 100%.
I don’t know what to do anymore.

Thanks for any help.

You have one main disk? What does df -h in the VM host show?
Not sure for Proxmox, check the documentation if it is required to run a resize-fs or not…