Mi Box - Android 6.0 TV Box - Mi Global Home
HDMI: HDMI 2.0a x 1 port (HDCP 2.2)
USB: USB 2.0 x 1 port
AV: SPDIF Out / 3.5mm audio output x 1 port
Power: 1 port
Maybe alan wants to use the usb port for extra storage?
Try this
https://www.amazon.com/gp/product/B06Y56BBYP/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B06Y56BBYP&linkCode=as2&tag=wireless2017-20&linkId=a74513e863d0852fa4c35eb9df866b49
try looking into filemaker and fmstarting point. It would require a server to store the data file if you want to have access on different devices. Other wise it can be install on a laptop. It shouldn't be hard to setup a small server for a small business.