[SOLVED] Proxmox: How to assign diskspace (a folder) on a new hdd to a docker

Hi. I switched from a few SBCs to a proxmox-server and i really enjoy it. Now - after playing a little bit around - i plugged an external 8tb-hdd on my server mainly for backups. I followed this tutorial: https://ostechnix.com/add-external-usb-storage-to-proxmox/

Next step is to use urbackup. I created a folder /urbackup on the 8tb-hdd and now i would like to assign this folder to the urbackup-docker but i do not understand how to do this.

What "content" do i have to choose for this case and how can i assign the folder to the docker?

Important EDIT: I forgot to mention that i do not use a VM but LXC!

SOLUTION in this case is pretty simple: https://pve.proxmox.com/wiki/Linux_Container#_bind_mount_points

For example, to make the directory /mnt/bindmounts/shared accessible in the container with ID 100 under the path /shared, add a configuration line such as:

mp0: /mnt/bindmounts/shared,mp=/shared

into /etc/pve/lxc/100.conf.

Or alternatively use the pct tool:

pct set 100 -mp0 /mnt/bindmounts/shared,mp=/shared

to achieve the same result.

Thanks a lot for your help!