MaxDigitalData 4TB 64MB Cache 7200PM SATA 6.0Gb/s 3.5in Internal Surveillance CCTV DVR Hard Drive (MD4000GSA6472DVR) - w/ 2 Year Warranty, Mechanical Hard Disk

Ordered 4TB HDD, got 2TB HDD labeled as a 4TB.

March 2025: After 5 years, a failed UPS Backup killed this HDD; it was reliable after all, albeit noisey. May 2020: The MaxDigitalData 4TB 64MB Cache 7200PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive was a very good buy. I've had it now for over two weeks, so this review isn't very pertinent. However, after reading the other reviews of longtime owners, I'm concerned about the longevity of this drive. The HDD that came with my inexpensive xMart-o CCTV NVR made *some* noise, like "chikka-chikka -chirrrrr, chikka-chikka". But this one started off with "WHARR WHARR GURRRR GURRRRR", that a "chkrrrlll chkrrrlll chkkrrrrlll". And it sometimes a hard grinding "WHHAAAAAHHHH" or "KHHRRRRRLLL". I am thinking there something wrong with this drive. I have deep concerns about the internals, and then I read about the heat (something that wasn't an issue my last drive). My last drive was "killed" because I couldn't my screen to come back on when it went out automatically. So I just unplugged it, and think it made "CHHKKKRRKKK" sound, after that it stopped being recognized. Not even when I put it inside an USB Enclosure and hooked it to my second PC. When I got the MaxDigitalData SATA HDD, the installation was flawless, and my system had no issue recognizing at initializing it. It even seems to run smoother. I did notice with the last HDD accessing video was sluggish. This does not seem to be the case with this drive. What I can report is that after two weeks the "WHHAARRRRWHARRRR" sound has stopped and has become a quieter ""qurrrrrllll qurrrlllll". Oh, well. It came with a two year warranty and I registered it online (I think..), so if anything happens between now and then...

My hdd is quiet ! 24 hours working fine. As long as it hold up, I would buy again ! DVR case with no fan is about 130 f, NO FAN ! Not hdd case , whole dvr case. Mention of possible blocked vent hole, is for high altitude possible changes, like an airplane use. Not a concern. Just to let air pressure equalize.

I purchased a zosi security system off Amazon and I failed to realize that it did not come with a hard drive, so in short it takes video but does not record any. After looking and seeing the part I need the company itself recommends a different one that is double the cost almost $100. I did some digging and found this one for way less and decided to give it a shot. I am by no means technical or good with electronics but I did find a YouTube video and followed it and was able to install this in my system within about 20 minutes. Installation was pretty straightforward and so far it has worked great my system is recording green lights are on. The only thing I wish was different is they do not include the screws that go to the bottom of this too attach it inside your system. So you will have to pick up some little tiny screws to fit luckily I had a couple in my junk drawer that would make do. It's been going a few days now and so far it has been great and I'm glad that I did not have to spend triple the cost. So yes if you have a zosi system this will indeed fit as long as you go by all the instructions.

i bought this drive cause all my external storage drives were full and needed more storage. been using a similar make 1 TB drive for my surveillance cam for over a year now in a docking station and it's running fine. this drive i just got is 4 TB surveillance drive, it should last forever just storing and watching movies with it. i am going to use it in the same docking station which has another open slot, for storage. it's the WavLink drive duplicator i got here last year on Amazon for around $20.00 which has also proven it self great to use. have already used it to duplicate my laptop drives and they are perfect. now using it for a docking station. i have to get and use what i can afford.