Wow, your partition is in trouble!
Wow, your partition is in trouble!
You haven't made any changes yet, so reinstalling W10 won't be a big issue. Also, you're probably looking to organize your storage this way for better performance.
In disk management you can usually adjust the size to almost any amount as long as you stay within available space. Just right-click on the partition you wish to reduce in size to create free space, choose "shrink volume," and a window will appear where you can specify the desired reduction.