Why is the 2nd light on the front flashing orange on my MSI A6200 laptop?

[jamij38]

Why is the 2nd light on the front of my MSI A6200 flashing orange? The other 2 lights are solid blue?

 

[Warukyure]

Is it the disk light thats blinking? If it is, means its doing stuff on the disk. (The Hard Disk)

The ones that are solid blue probably mean WiFi and Power.