NAS for two camera home security (one being a doorbell)

[Enquiries]

I am in the process of choosing a Synology NAS to support the use of Surveillance Station. Being new to the use of Surveillance cameras, I plan on using a doorbell and one WIFI camera to start (I do not have PoE wiring). Nor do I see the the need for extensive use of live feed notifications (at least currently). As I am entering this space, I am not sure what I may need/want in the future and choosing a system with expansion flexibility is important. Appreciate your advice. John