This review is for DS-7732NI-M4 32 Channel 8K NVR. I have a mixture of older 4K cams and newer PTZ 4K cams from a variety of vendors (20+ cams total). I needed to expand my recording capability and bought a few different NVRs, this was the only one that worked with all cameras, but the setup was a long trial and error. Instructions are better than most, but still not complete. The interface is really a pain, but once you wipe your setup few times accidentally, you learn what not to do. You can fit four harddrives into the case, it is big. Overall, the best value for the money I found, more importantly, it works and does not seem to crash. Will update after a year or two my review. Read more

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