Question Is this blinking red light an issue ?

Hi David,

Nope, not an issue at all. The blue light is probably for power, the red light is a hard drive indicator. When files are loaded from your hard drive (or SSD), that light will blink.

Absolutely fine, nothing to worry about. I forget they're even on my case, and chose to leave HDD LED cable disconnected, so the light doesn't blink anymore.