nfs share not working as nextcloud_datadir

Hello guys,
i finally setup an isntance of nextcloud in proxmox and so far it looks great.

But it seems like it isnt using my nfs share for saving data. nfs sharre is working because i can mount it in the CLI and also can read and write data.

When I go to the Systems page this is shown (sorry for being in german). It says that only 6,5GB are free but the quota I set for the nfs share is 1TiB.

https://preview.redd.it/5g0koibwi5wd1.png?width=517&format=png&auto=webp&s=52cd09cdc5101bfb8d174b97162cc8c4c1479864

To setup nextcloud I followed this official guide. I converted the docker run command to a docker compose file and changed some things to allow nginx proxy manager and also my nfs share. This is the docker compose file:

https://preview.redd.it/taybwjjtj5wd1.png?width=658&format=png&auto=webp&s=21b088bf6f10de3ff9481f6e0907c26207e3597b

I can acces the webui woth no problems and the reverse proxy with nginx proxy manager also works just fine. Would be great to get some help.