Set automatic photo backup after login HikBox APP, H100I will back up the photos automatically when the mobile connects with WiFi (APP runs in the background). It's the same to open automatic backup function for SD card and USB external storage device, no need to run the APP and H100I will back up the data from external device.
Yes, they can, SSD and HDD can also be mixed in H100I.
Yes, IP can be set manually from network setting in HikBox APP
There is no limitation on the software level, 20 is the maximum user quantity online via APP.