On the NAS device, blue LED lights signify

On NAS devices, blue LED indicators are used by manufacturers to signal that the device is operating normally and all functions are running as expected. This color convention is consistent across many NAS product lines where blue denotes healthy status, distinguishing it from error or warning states indicated by other colors such as amber or red.

Errors or malfunctions are typically indicated by amber or red LEDs, not blue.

A powering-down state is generally indicated by a blinking or fading LED sequence, not a solid blue light.

Standby mode is typically represented by a different color or a slow-blinking pattern, not a blue LED.