Synology FTP + Dahua IVS events

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Hi everyone,
Could you tell me if somebody set up ftp to upload IVS events ?
I configured external ftp based on Synology ds218+.
I setup ftp storage and checked Event and unchecked Regular and enabled it.
NVR starts upload pictures each second and I had to disable it
Is it possible to setup upload only IVS events not each second?

 

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Does somebody uses FTP storage for NVR?

 

[Gigapalooza]

I’ve found the same issue testing on my DS920+
It appears to be uploading all motion snapshots vs. IVS events. It’s frustrating and confusing. The NVR software is a maze of choices not well documented.
Apparently, the only choice is moving to Blue Iris, but I haven’t had the time to go down that rabbit trail yet.
Great cameras! But nothing else about Dahua impresses me.