Deleting those files can get you back up to 20 GB of disk space.

If you updated to Windows 10, you may notice a fair bit of disk space missing.

Windows saves files for previous versions of Windows so that you could uninstall Windows 10 should the need arise.

Those files can eat up gigabytes of disk space.

If you have a large drive, that may not be a big deal.

But if youre running low and youre happy with your Windows 10 installation, reclaiming that space is easy.

I was able to reclaim 22 GB, not a small amount on my relatively little SSD.

How to Reclaim Up to 20 GB of Hard Drive Space After Installing Windows 10| WonderHowTo