NAS for Home/photographer/backup/smart home

[Enquiries]

Hello, I am searching some home NAS solution to be used as a backup for my photographs, device backup (Windows PCs, iphones, ipad), running homebridge for smart home and multimedia center (partially). I was thinking about synology DS+ line but I have no clue which model (2 vs 4 bay, which line - 2xx, 4xx, 720, 723, 920, 923). I would probably start with 2 8TB HDDs (depends on the price and NAS model). Thank you very much for your advice. BR, Petr