WD Elements 2TB external - Blink Codes (Blue LED)

I have WD Elements 2TB external drive with USB connection and power. What are the blink codes?
Seems like:
Idle - slow blink (1 long blink/sec)
Active Reading /Writing - very fast blink (estimate of 8-10 short blinks/sec)

PC powered off - still has slow blink. Is this because the USB port probably has charge mode enabled?

Hi there,

There are no exact codes but basically, the description you gave is very accurate as to how the Led on the drive works.

Thanks.