p10lite - no usb prompt - after 8.0 update

[Android Central Question]

Hi,
When connecting my p10lite to an usb port, there's no usb prompt anymore. It was working before 8.0 update.
Tried everything: different cable.Different PC. Manually installed drivers. HiSuite allowed. Developer options enabled. Nothing works.
Even tried a reset. Same results.

I cannot see the storage from my computer, which prevents backup via cable.
Sure, I can do it via wifi apps, but why this happens? What is the workaround?
Anyone with same problem?

Thanks
Chris