Seagate Skyhawk, 4TB, Video Internal Hard Drive, 3.5", SATA, 6Gb/s, 64MB Cache, for DVR/NVR Security Camera System, with Drive Health Management, 3 year Rescue Services, FFP (ST4000VXZ07)

Came well packed and secure, will help with NVR which will b3 enough for now and making life safer and better to record things for my safety qnd back up when needed. 4TB hdd duse 5he job it is designed for. Can say i am confident enough to say worthwhile if you have NVR system, this hdd is not for NAS for NVR cameras system.

Easy to swap over. Only thing to watch in the reolink 8 channel recorder was when formatting the drive you need to click a tiny check box at the start of the line. I kept getting an error saying drive not recognised it was when you check the tiny box that looks like a bullet point it of course allows the newly connected drive to format. Then it just works. All settings saved likely on flash on the unit. So no hassle easy upgrade. Now with 5 off, 5Mp cameras recording has increased from 6 to oddly over 14 days of footage.

Good hard drive. Just what was needed to sort out what is required. Easy to install.

I have already got 3tb surveillance that took 5 week to nearly fill up and I installed a 4tb surveillance and it filled up in about a week and a half.running the same cameras.very strange.other than that it is OK.. install was easy to cctv unit..

Works fine in the HiLook NVR, good performance for CCTV

Purchased for use in my HIKVISION NVR, works perfectly and is compatible with 7600 series nvr. Overall happy with it, not sure about the reliability yet, will keep updated.

Great product easy to install and far better storage than original CCTV drive

So this is what turned up, delaying me finishing a job, having to pay to return at my cost. Shocking. Dont buy if you dont want your time wasting

I purchased the 4 TB drive. I was slightly concerned having a lower spin rate as well as a 64 MB cache. I am running eight cameras in a Samsung/Wisenet system. This system came with 1 TB and four cameras. But after I added four more to the system the 1 TB was no longer sufficient. I purchased this for terabyte drive, because it was the exact model of my 1 TB. This Is a 3.5 drive, so be sure that it will fit your console or whatever you are placing it in. It's important that people know this is not a standard drive and is made for surveillance cameras, or something that is access to an overridden on a regular basis. Unlike a standard hard drive in your PC that has correction control most of these drives for the surveillance systems do not have correction. Meaning once it copies the data there is no verification that the data was copied correctly. Why this is not usually a problem on a system is a good hard drive and a smooth running operating system it could result in data loss. That is why it is advised to buy a surveillance hard drive, something that is specifically made to run off and and to keep copying the files without correction. I found a hard drive to be very efficient, and for some reason works faster than my 1 TB of the same maker and brand. It is also quieter than the 1 TB that my system came with. In fact the fan on my DVR makes more noise than a hard drive does and I have a quiet fan. Keep in mind why this may fit the majority of DVR's that are out there formats do vary from Linux, Windows or their own proprietary software. And formatting the drive may vary. Generally speaking most surveillance hard drives are compatible with buried systems but keep in mind that your hard drive may need to be formatted either by the DVR system, or possibly externally done to make it compatible with your DVR. I have seen more people have problems with DVR hard drives when they do not realize that the system they are installing in a have a proprietary format system and may not be compatible with the drive you purchased. That is why it's important to find a hard drive that has a wide range of compatibility as well is something that's been around for a while. Your surveillance cameras are expensive investment for most people. And the data that we have on these hard drives is why they are valuable. Anybody can purchase DVR, and cameras are pretty similar across the board improving with each year. But hard drives are the core operating systems bread-and-butter of you will. When you need the hard drive to work you need to work, this is barely second two cameras being of high quality because you have a high-quality camera but if your hard drive is a standard drive or of a low quality you may have issues. So if you've invested the camera system it's wise to buy a compatible high-quality hard drive that is built for surveillance systems and has a decent warranty. Overview: I highly recommend the drive. At this time it installed quickly, was able to format on my DVR with no issues. Is extremely quiet and accessing data to copy to another hard drive, or to use for fast search was extremely fast with no issues whatsoever. Check on Amazon as the the prices vary from size to size. The 4 TB seemed to be about the best deal because it was slightly more than the 1 2 and 3 TB, but considerably less than the 6 TB, making this the best choice and value. Running at 4K, my cameras have enough room to record for approximately 2 1/2 to 3 weeks. Depending on whether you have motion or straight recording this can vary and your quality of cameras. I am guessing if you have a 1080 P camera system this may last you up to a month possibly depending on your settings.

I bought a Seagate Skyhawk 4TB disk a few days ago, but it has some bad sectors when doing full disk scan. I applied replacement and Amazon sent me this. Both of them were manufactured on August 2021. This disk has only one slow-read sector, no bad sector. According some article, small number of bad or slow-read sector are okay, disk can auto fix or relocate, however it could be an issue in future. I decided to keep the disk, I think it is hard to get a perfect disk. Hope it lasts. By the way, due to disk has 3 year warranty and it defaults to the date of manufacture, so the remaining warranty date is very short. I sent email to Seagate after warranty regstration, and they helped to update according the date of purchase. Amazon and Seagate service are okay, I am not satificated with the delivery due to the previous box was dented significantly, and slightly dented again this time. I have suggested Amazon to add FRAGILE label for products like HDD in future. 4 stars for delivery and the slow-read sector.

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I'm in NewZealand, no damage through shipping. great product.

Good product