In the past with earlier OS versions I could connect my Sony DSC W170 camera to a USB slot and transfer the photos with a file browser. Now after connecting the browser reports a directory called “USB PTP Class Camera”, but when I click on it I get “Unknown error code 150 I/O problem”. The camera card is not a standard SDHC card so I can’t stick in a USB card reader.
Sorry, did miss your second post. When it can be used as mass-storage on 13.1, it will not be the switch in the camera.
I vaguely remember a similar (or even same) thread here. It could be that in 13.2 the priority is changed from using mass-storage to PTP if both are supported by the device. When thgat is the case, maybe a bug report might be the way to go.