I see a "low disk space" notification everytime I insert my license dongle.
The "low disk space" notification is being thrown by the Windows operating system, and can be safely ignored, when it is referencing a license dongle.
If you would like to attempt to suppress the warning, then please see optional steps in this help link from "WIBU".
The "low disk space" notification occurs when the Windows OS detects that a disk partition has less than 200 MB of available disk space.
Reference Link: https://support.microsoft.com/en-us/help/555622/how-to-remove-the-low-disk-space-warning