As you may already know, Windows 10 includes the ability to automatically delete files in your Recycle bin, delete temporary files, and files in the Downloads folder to free up disk space. Starting with Windows 10 version 1809, the ability to remove the contents of the Downloads folder is added to the Storage Sense feature along with the classic Disk Cleanup tool (cleanmgr.exe).
Windows 10 includes the ability to automatically empty your Recycle bin, delete temporary files, and remove a number of other files to free up disk space. This is possible with the Storage Sense feature. With recently released builds, you can make Storage Sense run automatically on a schedule.
When Windows 10 is running low on free space on your disk storage, there are a number of ways to free up your drive space. Traditionally, the built-in Disk Cleanup tool (cleanmgr.exe) has been useful to remove temporary files, logs and Windows Update packages. With recent builds of Windows 10, Microsoft introduced a revamped Storage Sense feature which allows you to remove these files and more.
If you choose to install Windows 10 on the same drive where an existing installation is already present, the setup program will create a folder named Windows.old in the root of the drive. This folder will contain a full backup of a previous installation of Windows 8 or Windows 7, including the boot manager and installed apps. This is very handy if you plan to uninstall the currently installed Windows version and return to the previously installed release. It can also be useful if you forgot to transfer some files or settings to the new installation. However, if you are already finished with the migration, then Windows.old just wastes your disk space for no reason. Windows 10 got the ability to delete the Windows.old folder automatically in a recent build. Here is how to enable this feature.
Windows 10 got the ability to clear temporary files automatically in a recent build. Starting with build 15014, a new option appeared in Settings. Here is how you can use it.