Some of my USB drives and most of my SD drives don't have LED access lights.

Anyone know of a small utility that runs in the system tray that can emulate these LEDs and show read and write access to SD and USB drives?

I have tried:

1. diskmon - only works on hard drives
2. drivegleam - doesn't recognise USB drives
3. free_hdd_led

both of the last two fail to show my USB drives.

Any others?