G-Drive mobile USB not visible from MacBook Pro

I have a G-Drive mobile USB used as backup from MacBook Pro under HFS+. A more recent MacBook Pro under HighSierra (APFS file system) does not see it when connected to the USB-C plug.

Disk Utility does not see it either. What can I do?

Plugged through an adapter (USB-C USB). Light on G-Drive is off

Solved by unplugging plugging several times. Sorry for the disturbance.

Glad to see you got it working.