Synching surveillance station to remote NAS

Good Morning from Germany,
Although I think I am pretty familiar with the functions of my NAS (1821+) im looking for a solution.
I am using the surveillance station which stores the data/ videos locally on my volume. I tried out the encryption of the videos, but I am not sure if this is handy while using the DS CAM app. I am asked for the decryption password.
Is there a way to sync my local remote NAS on-the-fly? I am using the remote NAS with hyperbackup, but these jobs are scheduled a not on the fly. Searching for something like cloudsync for remote NAS with encryption would be fine.
Synching via Synology Drive Share also works, but only in combination with encryption of the videos directly in Surveillance station.
Any ideas?
Thanks in advance!!!