I plugged in my old hard drive into my PC and nothing showed up. I did some googleing and i found I had to go to Computer Management>Disk Management and enable that drive. I went there and I pretty much can't do anything. The hard drive I need to enable says its active.
Here what it looks like.
https://i.imgur.com/JuA2sEy.png
Edit: The hard drive was from my imac. Literally just pulled it out and plugged it in. Its also in 100% working condition.