Q. How can I identify compatible HDDs used for replacing or adding HDDs on the DVR?

When you are replacing the HDD of HDD using devices such as a DVR or NVR, make sure to check compatible HDDs from the compatibility list before replacement.

Incompatible HDDs may cause issues such as system instability or performance degradation.

Please refer to link and Recommended HDD Device List

http://www.hanwha-security.com/support/sw/install.do?menuCd=MN000173