MBL Green Light continuously flashing

MBL green light is continuously flashing. I can access the drive from all PCs on my network. Concerned that the indicator light is not acting like the indicator lights on my other MBLs.  Doesn’t stay steady green, doesn’t go to blue when not being accessed or all PCs on the network are shut down.  What’s going on? What does this mean?

usually it means the drive is busy, if you added a lot of pictures for example, it makes thumbnails, or smaller versions for web access.