I have a My Passport WD external hard drive and I'm using an asus laptop with Windows 8.1. It doesn't happen all the time but there are times when I'll hear a quiet beeping sound. It will go for about a second then stop for a few seconds and repeat. I only hear it while using my headphones and I thought it was an issue with my headphones but I noticed the light on my external hard drive would flash in perfect time with the beeps and when I unplug it, the beeping stops. The hard drive is making sound that picks up in my headphones. What can I do to stop this, if anything can be done?