How to Confogure HA so it recognizes hard drive

I have installed home assistant supervised. It’s on a Lenovo Thinkcente m720q’s 250gb m.2 storage device. I also installed a 2tb Samsung SSD. Is it possible to have access to this 2tb drive? I’m fully aware the 250gb drive I installed home assistants operating system is jsut for that, but I’d like to use that 2tb drive as a plex server. Is this possible, or do I have to take it out and install in another machine?

It’s one or the other…
Either way, none support having anything else on the machine than HA.

So if I want to run a plex server, I need another machine I take it? What would be some decent options that don’t break the bank?

You could instead install HAOS on a virtual machine (eg using Proxmox), and then use another virtual machine for Plex. Zero added cost.