Forum Discussion
Eamop
Jun 18, 2025Iron Contributor
How to add unused space to c drive without formatting for Windows 11?
Why the Windows 11 os takes so much space? I left 100GB space for C drive and windows os now occupies more than 90GB of c drive. My computer becomes lagging when the free space is less. The d drive ...
Difaya
Dec 31, 2025Iron Contributor
As far as I know, the built-in disk management tool can't do this. You have to format the c drive in order to add more space. If you don't want to lost the data, then the best way is to use a dedicated disk partition tool.
You can follow the trick shared in this post to add more space to c drive without losing data:
https://www.devshowto.com/add-unused-space-to-c-drive