Not working as USB device – dodgy bottom unit?

[klt]

@hnms

Hi klt,

what does your iMac say when you connect the phone? Anything like the “USB Device Not Recognised” that Nicholas was talking about?

I have not checked what my iMac is saying: Where would I check this ?

Anyway I can solve and reproduce the USB problem:

I have tried again to transfer files without success.
So I decided to install android debug bridge and switch on USB debugging.
Once I switched on USB debugging under Developer options:

File Transfer is working again

So I switched off USB debugging and File ransfer kept working.

However after rebooting the phone, I cannot transfer files anymore until I switch on USB debugging.

I hope this helps.