Helm problem with pvc

hello all,
im using proxmox VE with 3 ubuntu server 20.04 VMs to host my own k8s.
im using NFS share from NAS that is mounted on the VMs at /nfs.
when creating PV/PVC with other helm charts or deplotments it works great but when im using the helm chart of nextcloud and configuring persistence im getting permissions problems when the pod/container runs:
Initializing nextcloud …
rsync: [generator] chown “/var/www/html/.” failed: Operation not permitted (1)
im assuming that the container is trying to take ownership of files created in the NFS and dosent have the proper permissions.
my questions is what are the required permissions for the pod or the folder on the host.
im a bit lost.
thanks for he help!