This sounds very much like your My Passport hard drive has suffered some form of mechanical failure. Last week the drive when plugged into a USB port has begun to make 7 beeps, then 3 beeps followed by 3 beeps and a pause before repeating itself.” “I have a WD My Passport Ultra 2TB portable hard drive, which I have been taking back and forth to a clients site. We use a WD My Passport hard drive as an example but the information on this page applies to any beeping hard drive, not just WD.
This page is all about unresponsive beeping hard drives, explaining the fault in more detail and exploring the data recovery options available.