Good Morning @neuroboy,
@mb2x is correct, I do indeed have a Mac. The dialog you posted is something I see if I forget to unlock my Androids’ screen before plugging into my Mac. I also see it when the phones’ USB settings are set to something other than USB file transfer.
What I lack is a Pixel to test with. If someone would be kind enough to send me one to play with, I’d be most appreciative!
On the one household phone running Nougat (an Alcatel A30) the USB file transfer setting persists, so all that’s required is plugging it in to my Mac. Android File Transfer then launches and I’m able to see the phone’s contents.
Most other household Androids’ are still running Marshmallow. For those, the process goes something like this:
- Plug phone into Mac.
- Android File Transfer launches presenting the dialog about being unable to access device storage.
- Close Android File Transfer by clicking OK.
- Swipe down from the top of the phone to present notifications.
- Tap USB for Charging, then change to file transfer (MTP).
- Android File Transfer launches again and I’m able to see the phone’s contents.
I’m familiar with the setting you reference on your Moto X but that setting seems to have disappeared on Marshmallow and isn’t present on my only Nougat phone either. Your Moto X would still be on Lollipop.
None of the above directly addresses the experience with your Pixel, however, I hope it’s somewhat helpful.