Disk mount problem PVE 9.1.7

[lsdfr]

Newbie here
I've a single pc running proxmox PVE 9.1.7 on a 500gb NVME drive and would like to add a 4TB sata disk for video storage.
I'm stuck on how to mount the sata disk in a VM

Here's what I've done - assume I've made some basic mistakes

Installed proxmox on the NVME drive
Created a VM to run docker which all works fine (install Frigate) - on the NVME drive (local-lvm) - now would like to store the video files on the sata drive
Under the PVE/disks - created a Directory disk - type ext4 - labeled "Video" (drive had been wiped/GPT)

Now I assume this is the bit I dont get
Under the docker VM (200 ID), Hardware - I added a Hard Disk (SCSI) selected the storage (Video) and set disk to 300 (GiB)
This created a Video:200/vm-200-disk-0.qcow2 VM disk

under the VM's console - lsblk shows - sdb 300G, type disk
and ls -la /dev/disk/by-id shows SCSI-0QEMU_QEMU_HARDDISK_drive-scsi1 -> ../../sdb

I'd like to mount sdb to /mnt/media but I can't find a way to do this - not sure if type flag I'm using is correct

Am I just doing the whole "add drive" process wrong ?

 

[Impact]

Is there a good reason you didn't make the storage LVM-Thin or ZFS? Directory can have som disadvantages.
Inside the VM you need to initialize/format the virtual disk, create a filesystem and then mount it. This has most of the information.