I save snapshots to the config/www/tmp directory . I don’t think the camera integration has permission to save images outside of the www directory, and I don’t know how to give it permission to (or if its possible)
The documentation mentions to use config/www (I believe you can create/specify whatever subdirectory your want in the www folder)
I recall having a lot of issues setting this up and ended up just using a blueprint that has been working well for me