NAS compatability is usually based on protocols. FTP is 30 year old protocol standard, best use secure SFTP or ssh protocols. All NAS devices that adhere to rfc standards will work. As your using the NAS device as a dropoff for files, rather than a interface for viewing and recording, that is the cameras job.
As the poster noted NFS can be utilized as well, probably to 3.0 standards its still the most common. Lots of people use QNAP and Synology around here, also many linux derivatives like FreeNAS. Choose your NAS based on open standards and linux you can’t go wrong. If your looking consumer NAS use the above noted.
Do your research on cameras as well, welcome to the forums.