A Microsoft file hosting and synchronization service.
the ONLY way I managed, was to login on my ANDROID and delete the bin from there.
There's NO WAY to do this online from a PC, nor iPhone.
Unbelievable, this kind of mess happens on one of the main cloud services everyone uses, not to mention the kind of solution responses here, utter garbage.
I am now moving all my camera backup to another solution, microsoft is obviously not worth this trust.
SHAME !!!