There are presently no folders in my Design Library (in the task pane).  Sometimes they're there.  Sometimes not.  I've confirmed my File Locations in Settings is pointing to C:\ProgramData\SOLIDWORKS\SOLIDWORKS 2020\design library.

When they ARE there, the subfolders are the following, but there is no fastener or unistrut database in there (nor in the subfolders).  I configured my Toolbox successfully (I think -- basically I just unchecked most of the folders for various standards and left English and Metric plus a couple of others).

Annotations
Assemblies
Features
Forming Tools
Motion
Parts
Routing
Smart components

Using Student Edition.  Windows 10 on a modern PC.  Screenshot below.  Thanks!