Windows 10 lets you easily change the default Save location for Documents, Music, Picture and Video files. The procedure was different in Windows 8.1, Windows 7 and earlier, and now things have changed a bit. In fact, it has become easier now. You an now save your personal files like Documents, Music, Picture and Videos to another drive or partition or even an external drive by default.
Change default Save location in Windows 10
While you can change the default location of the Documents folder via Documents properties or by editing the registry, Windows 10 makes things easier as you can do so via the Settings app.
Open Start Menu > Settings > System settings.
Next, click on Storage in the left pane.
Scroll down a bit and find Save locations.
Here you will see New documents will save to setting – and similar settings for Music, Pictures & Videos.
Select the location from the drop-down menu.
Thus you can set different Save locations for different types of files.
UPDATE: In Windows 10 Creators Update v1703, you need to navigate as follows:
Settings > System > Storage > Change where new content is saved. Make the changes in the following windows which opens.
If you are suffering from the low space issues after upgrading, you can use these technique to move Documents and other personal folders from the default system drive to another drive.