Since you will not be able to delete this folder conventionally, you will need to go for a workaround in order to be able to delete this folder and its contents. How to delete the mountUUP folder on Windows Update: There are also situations where a download glitch causes this folder to grow abnormally high (over 100 GB) – in this case, you really have to delete the main folder and its contents in order to prevent your HDD / SSD from filling up. Unless you have a specific use for the UUP files located in this folder, deleting it is perfectly safe and won’t affect (in any way) the functionality of your current Windows installation. You’ll find this folder on Windows 8, Windows 10, and Windows 11. This is a folder that typically gets generated after you download and mount an insider preview build of Windows. MountUUP falls into a special folder-protected category, so you’ll need to go for an unconventional approach if you really want to delete it. However, getting rid of this folder and its contents is not as easy as you’d want.

The MountUUP folder is known for growing to be quite big, so it’s understandable why some Windows users might want to delete it in order to free up space.

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