How to add the hard drive so that Umbrel?

I am running an Umbrel on a virtual machine for use as a cloud. I want to add an external hard drive to the Umbrel. I have already added it to the VM, and it is being recognized, but I couldn’t get the Umbrel to recognize it. I have little knowledge of Linux and am starting to learn with the use of Umbrel.

Can someone explain in detail how to add the hard drive so that Umbrel recognizes it?