By default, Windows will store any update downloads on to your main drive, this is where Windows is installed, in the C:WindowsSoftwareDistribution folder. If the system drive is too full and you have a different drive with enough space, Windows will often try to use that space if it can.

Where are downloaded Windows 10 updates stored?

The default location of Windows Update is C:WindowsSoftwareDistribution. The SoftwareDistribution folder is where everything gets downloaded and later installed. Next, use Ctrl+Alt+Delete to launch the Task Manager and switch to Services tab, and then right-click on wuauserv, and stop it.

Where is the downloaded Windows 10 file stored?

The Windows 10 installation files are installed as a hidden file in the C drive.