Hi,
I think I found the solution. Basically it was mentioned in an earlier forum.
My solution was to select the mounting path SMB/CIFS
As user name give the name of the shared folder and his password
File path: /folder (without the /volume1 in front)
Test and save this configuration
Then go to STORAGE MANAGEMENT
Select the HDD with the NAS and format the HDD. No worry, it does not format the drive, it just puts down folders to the drive.
This worked in my configuration with the Synology DS214se and the two DS-2CD2332-I (multi lingual Chinese, V5.2.5 build 141201)
This might help also:
http://securitycameranet.com/download/IVMS_Hikvision_oem/hikvision%20orginal/Technical_Bulletin/2014/Quick%20Start%20Guide%20of%20Hikvision%20IP%20Camera%20&%20Synology%20NAS%20Connection_v1.1.pdf
Regards
Doddy