Change/update storage device size

I have Embassy on Proxmox. Initially I created a 32GB storage as a test. Decided to up that to fit the blockchain and but the disk size is still reporting about half that. How can I update this to reflect the full ~800GB the VM now has allocated?

I am getting errors from the bitcoin-core service logs that is it out of space.

We have no official flow for expanding virtual storage. If you have not done anything else, then I would recommend just wiping it and starting over with the full disk allocated