The DS-7616NIK2 is old enough that many “free download” sites are either dead links or malicious. Only use a file directly from a hikvision.com domain (with HTTPS) or provided by official support.
The firmware for the Hikvision DS-7616NI-K2 NVR is typically found on the official Hikvision download portals, though it is critical to select the version that matches your specific region and hardware revision to avoid "firmware mismatch" errors. Direct Firmware Links Official Hikvision Portal: ds7616nik2 firmware link
: Format a USB flash drive to FAT32 . Copy the .bin firmware file directly to the root directory (do not place it in a folder). Execute Update : Insert the USB drive into the NVR. Navigate to System > Upgrade . Select USB Update and choose the file. The DS-7616NIK2 is old enough that many “free
The official firmware is hosted on Hikvision’s regional portals. It is often recommended to update in chronological steps if your current version is very old. Hikvision UK/Europe Portal : Provides a direct directory for the K-Series NI-K2 NVR Firmware Recent versions found include (Build 240108) and Hikvision Global Download Center Firmware Download Tool Direct Firmware Links Official Hikvision Portal: : Format
If you are unsure of your device's region or exact hardware revision, Hikvision recommends these methods:
The Synology DS7616+ (model designation sometimes written as DS7616nik2 in user searches) is a 12-bay/16-bay class NAS used for SMB and enterprise storage. Firmware updates (Synology DSM and related packages) keep the device secure and add features; always use official downloads from Synology.