I'm testing with the "Storage Device" and "Usb Connectivity" Policy.
I get a lot working, but i don't understand something.

Both policies has a list for custom devices. What is exactly the different? beside that one has also "read only" and the other has a lot of more rows to fill in.

When do you use the list of both, or do you need to combine it?

For examply it want to:
- Disable all Mass storage (USB) by default
- Allow every usb stick from manufacture "Sandisk" and model "Cruzer". with Read only

What's the best way todo that. I'm stuck on the custom lists.