Power light is solid red but it's working

My Cloud OS 5 Personal & Network Attached Storage My Cloud EX Series
1

Hi, I recently purchased and configured a My Cloud EX2 Ultra with two 4tb hard drives. It’s working just fine but the power light is solid red. What could it be? It doesn’t seem to have any problem: it’s working. Maybe it’s too full? How many free space is recommended? Thank you!

3

Yes, “The volume usage is above 95%”.

Thank you.