I don't think it works with a NAS, at least I don't see any such function in the app. However, the camera has an inbuilt 7GB memory that can be accessed via the app. It stores events up to 60 seconds, I have been using the camera since 05.01 and have 98 stored events since then, which corresponds to 416 MB...

No, it does not work with Synology NAS at the moment