Changing default location of library folders in Windows 7/8/10
Open Windows Explorer, there are 4 sections for Windows 7/8/10 Library. These are setup on drive C in a Users folder. These libraries are Documents, Pictures, Music, and Videos.
In each section, there are "My ...." folders e.g., for Documents, there is a "My Documents" folder.
To move this folder to another drive, for example, to D drive. Create four new folders in D: drive. These folders can have same name as My Documents, My Pictures, My Music, and My Videos or different names (Documents, Pictures etc.
Go to default Library in Windows Explorer.
Right click on the respective "My ...." folder for each Library section, e.g., for Documents, right click on "My Documents"
Click on Properties
Click on Location
Click on Move button
Select the respective folder from your D drive, for example, the new "My Documents" on Drive D or Drive E.