This post explains C drive vs D drive. If you don't know what C drive and D drive are used for, I recommend you to read this post.
![[2 Ways] How to Repartition a Hard Drive Windows 10/Windows 11? - MiniTool Partition Wizard](https://i.pinimg.com/originals/e7/b6/7f/e7b67fc95faeff7dbec9dddf9a591a96.png)
