Maps downloaded in Windows 10 for offline use can take up space if there are a lot of them . While they can be very useful for navigation when not connected to Internet, the storage and update settings for them can still be tweaked if needed.
Here is how :
Access Windows Settings (shortcut : Windows key + I). Choose System.
Next, click on Offline maps.
There, scroll down to Storage location and change the drive path.
Also if needed, offline maps that are no longer needed can be deleted individually or all of them from Maps section.
By default, maps are automatically updated over wi-fi or any network that is not metered. These updates too can be disabled if needed. Turn it off from Map updates section.