NAS drives - which are compatible and affordable?

I’m looking to find some compatible NAS drives that are affordable - RTSP protocol I believe? Any help would be appreciated. Thanks!

Synology my absolute nr1 great performance and many updates over the years.

You actually got it working? I gave up trying to get my DS718+ to work with my 2C Pro cams. Any tips?

You can use a Raspberry PI and run MotionEye on it to brew your own NAS for a lot less than you will pay for a Synology NAS. That way you can mix and match any cam that supports RTSP.