Connecting the Digital Camera directly to the Computer usually mounts the device as a PTP or MTP/WPD device.
Some camera's will mount as Removable Storage (USB Drive).
Some cameras let the user choose what type of device to mount as (like modern android phones/tablets do).
To learn more about PTP, WPD, and MTP - a good wiki resource: Media Transfer Protocol - Wikipedia, the free encyclopedia
We define each type of device and apply restrictions to it.
PTP - Bus Type = "USB", Device Class = "Windows Portable Device", USB Class Code = "06h - image".
MTP -Bus Type = "USB", Device Class = "Windows Portable Device", Device Compatible ID starts with "USB\MS_COMP_MTP".
Removable Storage - File System Access = "Read-Write" (this seems to catch ALL Removable Media/Storage without needing to define Bus Types).
Thanks for your reply. We are now working with removable storage file access rules.