WD Backup don't recognize My passport ultra visible in Windows 10 et 7

Hello,

1 ) WD Backup don’t recognize my external drive My passport ultra 1To on two different computers but it’s visible on Windows and on WD data lifeguard diagnostics.

WD drive utilities failed to recognize it also, of course.

  1. The same WD Backup recognizes a second external drive (My passport essential) ;

  2. I followed the WD support instruction (using “services.msc”) without any success and they don’t give me any solution to solve this trouble.

Could you help me ?

Thank you et sorry for my english… I have to brush up my skills in order to talk about technical matters