How do I turn a storage pool back into a normal harddrive?

A while age I converted my Toshiba Harddrive into a storage pool so I could fit more storage onto my Windows 10 laptop. I no longer need it to be a storage pool anymore and want to convert it back to its original state so it can work like a normal harddrive again.

I tried doing this myself by going into the disk management place and deleting the volume on it, but then it disappeared and there was no option to convert it back to a basic disk which I thought would be the last step. It completely disappeared and I don't know how to access my drive anymore as I cannot find it anywhere in my computer.

All the help would be appreciated as this harddrive cost me an arm and a leg and I really want it to go back to normal.

Thank you.