Passport ultra

When I plug my passport ultra in a USB3 port I loose internet connection

How are you getting internet access? Wifi? Ethernet? Powerline? Does it do the same thing to a different computer?

only have one computer Wifi

The laptop may not be supplying enough power to both power the wifi card and the USB drive (USB powered drives like the WD Passport pull a lot more juice from the laptop than a powered USB drive like the WD My Book would). It’s also possible that there is somehow a driver conflict or something else going on at the OS level that is causing it to go squirrely.

Does the same issue happen when you connect the laptop to the internet with the Ethernet cable?

Also, is the drive fully accessible? Can you read/write data to it?

it`s Twer not a Laptop and the drive is fully accessible

Does the same issue happen when you connect the tower to the internet with the Ethernet cable?