Seagate Skyhawk 4 TB, Video Internal Hard HDD – 3.5", SATA 6Gb/s, 256MB Cache, for DVR NVR Security Camera System, with in-house Rescue Services (ST4000VX016)

Working very well in my custom designed CCTV hybrid DVR. Review of Seagate Skyhawk 4TB ST4000VX016.Yes its a bit noisy seeking, but mine is in a cabinet in the garage so I don't mind at all, it might be a shade annoying in a quiet environment though.Performance is excellent, it holds up a constant fairly high record rate with easy, all the streams are smooth. Whilst also giving me really quick seeking and replay at the same time, the system just feels smoother and snappier.Beware, there is another version around that is a tiny bit cheaper, the ST4000VXZ16 - note the 'Z' in the code, it has only a quarter of the cache of this version and other changes. For a couple of quid more, this one (without the 'Z') is the one you want.To early to tell on life expectancy, these things do have a really hard life in this application so you have to be a bit realistic.

Exact direct replacement. Ordered Sunday evening arrived Tuesday. CCTV working again.

HD used for cctv system and still going strong. Great value.

Item running very good. No any problemsBut I received the item package very poor not original package they send me with clear bag look like very cheap

Easy to fit works great

no issues so far with this drive fitted straight into the new base unit and worked just fine brought it as it is meant for use in security Surveillance Hard Drive would recommend the seller as no issues with this order.

HDD came today. So far it works, it's a legit HDD aswell. The only thing wrong with it is1. It's not in offical packaging it's just in a plastic static resistant bag.2. There's a big sticker on the front stating "Warranty only valid in China"I contacted Seagate to ask about this. They confirmed the HDD is genuine from the serial number, but then informed me that as my region is the UK and this HDD is for the China region, if the HDD was to fail I would need to get a replacement from the seller as they wouldn't help due to the region difference.This may or may not be an issue, if the seller is genuine and replaces it. If the seller refuses or ignores you like a lot of sellers do, then you've bought a brand new HDD with no warranty.

Works in my Ubiquiti Dream Machine SE (UDM-SE) perfectly, no issues. Well apart from the information message that persists in the console "Please verify that your HDD is a CMR drive by checking the device’s spec sheet or the manufacturer website." but I have checked and confirmed this drive is a CMR drive so it can be safely ignored.