Last updated at 09/06/2026 06:09:08
Seagate Exos X18 Enterprise 12TB 512e/4Kn 3.5in SATA HDD ST12000NM000J
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Seagate Exos X18 Enterprise HDD (SED) (12TB, ST12000NM001J)
7-day returns
Seagate Exos X18 12TB 3.5" 512E/4KN SATA Enterprise Hard Drive - ST12000NM000J
Seagate Exos X18 ENTERPRISE 512E INTERNAL 3.5' SATA DRIVE, 12TB, 6GB/S, 7200RPM, 5YR WTY
[ST12000NM000J] Seagate Exos X18 12TB 3.5" SATA Enterprise Hard Drive 7200RPM
Delivery between 11–17 June $11.95
Seagate Exos X Series 12 TB 3.5" Enterprise Class Internal Hard Drive - Serial ATA III
Delivery between Thu – Mon $12
St12000nm000j Seagate Exos X18 3.5" Sata 12tb Hard Drive
Free delivery
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Seagate Exos X18 St12000nm000j 3.5" Sata 12tb Hard Drive
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
[ST12000NM000J] Seagate 12TB Exos X18 3.5" SATA HDD 512e/4KN FastFormat 7200RPM 256MB Cache
Delivery between 12–16 June $10
"Seagate 12TB Exos ST12000NM004J X18 3.5"512E/4KN SAS Enterprise Hard Drive"
Delivery $12.99
originally posted on ebay.com
It's exactly what I wanted for backup purposes. Doing videos for YouTube, I've amassed quite a number of video clips and the usual smaller hard drives and NVMe SSDs quickly fill up. The NVMe system is great for fast transfer rates but are still quite expensive and, from what I've read, aren't a good medium for the long run. The hard drives aren't perfect, but I don't recall having one fail on me. This reliability factor is important for archiving and speed isn't necessarily all that important. Backups can be run at nighttime. I'm using a Unitek hard drive connector to my OWC Thunderbolt 4hub. I'm still waiting for my M2 Mini Mac from Apple. It's late on arriving so I've got it connected to my old 5,1 Mac Pro just to see how it runs. No problems so far! Keep up the ... MoreIt's exactly what I wanted for backup purposes. Doing videos for YouTube, I've amassed quite a number of video clips and the usual smaller hard drives and NVMe SSDs quickly fill up. The NVMe system is great for fast transfer rates but are still quite expensive and, from what I've read, aren't a good medium for the long run. The hard drives aren't perfect, but I don't recall having one fail on me. This reliability factor is important for archiving and speed isn't necessarily all that important. Backups can be run at nighttime. I'm using a Unitek hard drive connector to my OWC Thunderbolt 4hub. I'm still waiting for my M2 Mini Mac from Apple. It's late on arriving so I've got it connected to my old 5,1 Mac Pro just to see how it runs. No problems so far! Keep up the good work.
originally posted on ebay.com
Description was accurate for one of the drives.. beeping sound and wont turn on. Managed to fix that one but the other was completely dead on arrival. No beeping sound and wouldnt attempt to turn on like the other drive. Wasnt able to do much with the dead drive and am not sure why it wouldnt at least beep. Description was a bit inaccurate. Took a loss on this one.
originally posted on bhphotovideo.com
SEAGATE EXOS X18 12TB 11/20/23.Bought 2 from B&H, packaged well, arrived in 1 day free shipping standard included. The seagate is heavy and built like a tank, ultra quiet, cool to warm to touch in heavy use, 256-278gb/s speed, excellent value for the money. Will see in time how it performs and lasts.The good thing B&H is an authorized dealer for seagate if you ever have an issue contact seagate with your reciept which indicates when you bought it new because seagate otherwise would go by the manufacture date imprinted on the seagate hdd case instead. keep your receipts and enjoy this product which is my first mega hdd of this size and will fit it in a multi bay enclosure, have fun....
| General | |
| Device Type | Hard drive - internal |
| Capacity | 12 TB |
| Interface | SATA 6Gb/s |
| Buffer Size | 256 MB |
Seagate Exos X18 Enterprise 12TB 512e/4Kn 3.5in SATA HDD ST12000NM000J
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seagate Exos X18 Enterprise HDD (SED) (12TB, ST12000NM001J)
7-day returns
Seagate Exos X18 12TB 3.5" 512E/4KN SATA Enterprise Hard Drive - ST12000NM000J
Seagate Exos X18 ENTERPRISE 512E INTERNAL 3.5' SATA DRIVE, 12TB, 6GB/S, 7200RPM, 5YR WTY
[ST12000NM000J] Seagate Exos X18 12TB 3.5" SATA Enterprise Hard Drive 7200RPM
Delivery between 11–17 June $11.95
It's exactly what I wanted for backup purposes. Doing videos for YouTube, I've amassed quite a number of video clips and the usual smaller hard drives and NVMe SSDs quickly fill up. The NVMe system is great for fast transfer rates but are still quite expensive and, from what I've read, aren't a good medium for the long run. The hard drives aren't perfect, but I don't recall having one fail on me. This reliability factor is important for archiving and speed isn't necessarily all that important. Backups can be run at nighttime. I'm using a Unitek hard drive connector to my OWC Thunderbolt 4hub. I'm still waiting for my M2 Mini Mac from Apple. It's late on arriving so I've got it connected to my old 5,1 Mac Pro just to see how it runs. No problems so far! Keep up the ... MoreIt's exactly what I wanted for backup purposes. Doing videos for YouTube, I've amassed quite a number of video clips and the usual smaller hard drives and NVMe SSDs quickly fill up. The NVMe system is great for fast transfer rates but are still quite expensive and, from what I've read, aren't a good medium for the long run. The hard drives aren't perfect, but I don't recall having one fail on me. This reliability factor is important for archiving and speed isn't necessarily all that important. Backups can be run at nighttime. I'm using a Unitek hard drive connector to my OWC Thunderbolt 4hub. I'm still waiting for my M2 Mini Mac from Apple. It's late on arriving so I've got it connected to my old 5,1 Mac Pro just to see how it runs. No problems so far! Keep up the good work.
Description was accurate for one of the drives.. beeping sound and wont turn on. Managed to fix that one but the other was completely dead on arrival. No beeping sound and wouldnt attempt to turn on like the other drive. Wasnt able to do much with the dead drive and am not sure why it wouldnt at least beep. Description was a bit inaccurate. Took a loss on this one.
SEAGATE EXOS X18 12TB 11/20/23.Bought 2 from B&H, packaged well, arrived in 1 day free shipping standard included. The seagate is heavy and built like a tank, ultra quiet, cool to warm to touch in heavy use, 256-278gb/s speed, excellent value for the money. Will see in time how it performs and lasts.The good thing B&H is an authorized dealer for seagate if you ever have an issue contact seagate with your reciept which indicates when you bought it new because seagate otherwise would go by the manufacture date imprinted on the seagate hdd case instead. keep your receipts and enjoy this product which is my first mega hdd of this size and will fit it in a multi bay enclosure, have fun....
I'm loving these drives. They are a little bit overkill for a home NAS, but I wanted to build a shared volume that could take better advantage of my 10g network. I have 4 of them in a RAID10, and I'm loving the performance. In terms of noise, my only comparison is an array of 10TB Ironwolfs, and these Exos are louder. The Ironwolfs were never loud enough to be heard over the quiet NAS case fans, but the new Exos can be heard when they seek. I imagine most people buying enterprise drives don't care about noise, but when I was trying to decide on buying these drives (which were cheaper than the equivalent Ironwolfs), I couldn't find noise level data published anywhere. I would say the noise isn't bad, but I definitely have been moving frequently accessed shares back ... MoreI'm loving these drives. They are a little bit overkill for a home NAS, but I wanted to build a shared volume that could take better advantage of my 10g network. I have 4 of them in a RAID10, and I'm loving the performance. In terms of noise, my only comparison is an array of 10TB Ironwolfs, and these Exos are louder. The Ironwolfs were never loud enough to be heard over the quiet NAS case fans, but the new Exos can be heard when they seek. I imagine most people buying enterprise drives don't care about noise, but when I was trying to decide on buying these drives (which were cheaper than the equivalent Ironwolfs), I couldn't find noise level data published anywhere. I would say the noise isn't bad, but I definitely have been moving frequently accessed shares back to my old array to keep these new disks from constantly seeking during the day. If I didn't have that choice, I would probably look into moving the NAS farther away from my desk. One of the 4 drives I originally ordered died during the initial scan that was performed while building the array. This actually caused kernel panics in my NAS that rendered the web interface inoperative until I removed the offending drive, so next time I will definitely run extended SMART tests on the individual drives before adding them to an array. The RMA on the dead drive went fine. I don't have a problem with drives arriving DOA every once in a while, as statistically this is just a fact of how hard drives are built and shipped, regardless of the model or brand. And the 4 I ended up keeping are working great!
I've had a pair of these in my Desktop with Proxmox as a base system and pass-through [GPU] Windows for my daily driver, in a zfs mirror pool using a couple of old sata ssd's as a "special" mirror in the same pool as a cache ... sort of, for ... dunno ... 2 or 3 months maybe, now, and so far no issues. Just saying here - as a quick review thingy, as I saw some people weren't so lucky. Super expensive, but still fairly competitive in pricing relative to others, for what they promise and have so far, (early days), delivered. They are mechanical: they make some noise, but it's not,too bad and I quite like it lol. :) I do tend to use it for local back-up copies and bigger media files and the like ... the ssd's are set to store very small files to improve over-all ... MoreI've had a pair of these in my Desktop with Proxmox as a base system and pass-through [GPU] Windows for my daily driver, in a zfs mirror pool using a couple of old sata ssd's as a "special" mirror in the same pool as a cache ... sort of, for ... dunno ... 2 or 3 months maybe, now, and so far no issues. Just saying here - as a quick review thingy, as I saw some people weren't so lucky. Super expensive, but still fairly competitive in pricing relative to others, for what they promise and have so far, (early days), delivered. They are mechanical: they make some noise, but it's not,too bad and I quite like it lol. :) I do tend to use it for local back-up copies and bigger media files and the like ... the ssd's are set to store very small files to improve over-all performance, and I have a bunch of RAM I use with ZFS for deduping too; they're not active all the time - these drives. But they're not ... unpleasant, when they are active. Very pleased I bought them so far. Since buying tons of hard drives since the early 90's, I do they have seem to have become more reliable, over-all, with time. I possess, maybe about 40 ish working mechanical hard drives at the moment - probably all less than 10-years old I think (rotating some as offline storage), and I'd say over the last 5-years I've had more SSD failures than mechanical failures - although SSD's are getting better too.
Used for a DS 1821+, its only been a week but they seem to working great. They are quieter then I was expecting. Also they run fairly cool and that was nice to see as well since our rooms tend to run a little warm. I have seen some people talk about seagate drives and a high failure rate but I have never had a problem with any that were from Thailand. I have 8 of the 18tb, 10 of the 10tb, 2 of the 16tb, and 7 of the 4tb that are older than i can remember and still keep running. All are enterprise class drives. Zero failures for all the above. All the above are from Seagate Thailand manufacturing. Seagate should take notice of this fact.
One of the six drives ended up failing within the one year warranty period, and a second drive caused TrueNAS Core to report that it was slowing down the already abysmally slow volume. Despite being in a 6-drive RAID-Z2 configuration, these drives performed worse than an old SD card and rarely exceeded 45MB/s from the entire 6-drive array. The previous drives (8TB HGST SAS) would deliver 550MB/s consistently in the same configuration. I've learned my lesson to continue steering clear of Seagate and stick with WD. I should have trusted the Backblaze failure rate numbers showing that Seagate has drives die at orders of magnitude higher rates than their peers.
I bought the hard drive, 2 weeks ago, the first one did not work out the box, just like one of the reviews stated earlier BUT, Scan quickly sent DPD to pick up the hard drive and within a week I was replaced with a brand new replacement.It's early days but its working like a charm, it can be a little noisy but its not enough to distract or irratate you when your doing your work. Like all hard drives, if your installing into a PC your going to lose a little bit. So I actually have access to 16.3TB.I would deffinetely buy another two at some point later, to replace my other drives. My trade is a Creative (graphics, animation, illustration, motion graphics) and sometimes as a hobby a beat maker. So as projects and files get bigger, I need a bigger hard drive, ... MoreI bought the hard drive, 2 weeks ago, the first one did not work out the box, just like one of the reviews stated earlier BUT, Scan quickly sent DPD to pick up the hard drive and within a week I was replaced with a brand new replacement.It's early days but its working like a charm, it can be a little noisy but its not enough to distract or irratate you when your doing your work. Like all hard drives, if your installing into a PC your going to lose a little bit. So I actually have access to 16.3TB.I would deffinetely buy another two at some point later, to replace my other drives. My trade is a Creative (graphics, animation, illustration, motion graphics) and sometimes as a hobby a beat maker. So as projects and files get bigger, I need a bigger hard drive, especially for storing reference be it images, footage and the work files.
I selected this drive as the 16TB seemed less reliable in tests and is barely cheaper. Moreover, I wanted the ability to replace on failure. That is where the 5 year warranty comes in. Some third party vendors resell OEM drives that lack this warranty or US origin sales. My experience is that of they fail it is the first 3 months. Once you pass that hurdle, you are typically fine. Please ensure you back up your files.One word of caution, duplicating a smaller drive and enlarging the image size may bump you into partition size limitations in Windows, resulting in unused disk space. That is fixible with third party software, but cumbersome and introduces the risk of data corruption. Instead format this disk and copy the content.I have multiple brands of harddisk ... MoreI selected this drive as the 16TB seemed less reliable in tests and is barely cheaper. Moreover, I wanted the ability to replace on failure. That is where the 5 year warranty comes in. Some third party vendors resell OEM drives that lack this warranty or US origin sales. My experience is that of they fail it is the first 3 months. Once you pass that hurdle, you are typically fine. Please ensure you back up your files.One word of caution, duplicating a smaller drive and enlarging the image size may bump you into partition size limitations in Windows, resulting in unused disk space. That is fixible with third party software, but cumbersome and introduces the risk of data corruption. Instead format this disk and copy the content.I have multiple brands of harddisk drives, but have been moving back to Seagate as a result of publishred rialibility results. So far 62TB of Seagate storage without problems.
I now have four of these X24s running in my 24-drive Synology NAS system with a smattering of X18s and X20s; the drive database has been hacked to recognize them as compatible (see syno_hdd_db.sh on Github). They are all flawless performers and run at reasonable temperatures: 34-27C in the lower unit, 39-44C in the upper. Not a single bad sector with between 11K and 30K hrs on them. Highly recommended.
| General | |
| Device Type | Hard drive - internal |
| Capacity | 12 TB |
| Interface | SATA 6Gb/s |
| Buffer Size | 256 MB |
Seagate Exos X18 ST12000NM000J - Hard Drive
PF240-ARGB Water block includes a pump with multi chamber design that isolates hot and cold liquid channels to prevent heat bleeding, thus making it more effective at removing heat away from the water block. The pump motor utilizes three phase, six pole design for smoother, quieter operation compared to most single phase, four pole design. Energy efficiency also improves as well. 0.2mm micro liquid channels evenly distribute liquid flow for improved heat dissipation An automotive grade sine wave generator is used to drive the pump motor. This ensures electrical noise and vibration are kept to a minimum. It is also AEC-Q100 certified according to Automotive Electronics Council’s standard so it has great quality and durability. Automotive grade radiator is used so it has excellent anti-corrosive properties and can easily survive harsh elements that includes vapor, liquid, grease, solvent. Included PWM fan has unique ribbed edge fan blades that suppress air turbulent noise with geometry optimized for both air flow and pressure. This ensure maximum performance with lowest possible noise.
PF240-ARGB Water block includes a pump with multi chamber design that isolates hot and cold liquid channels to prevent heat bleeding, thus making it more effective at removing heat away from the water block. The pump motor utilizes three phase, six pole design for smoother, quieter operation compared to most single phase, four pole design. Energy efficiency also improves as well. 0.2mm micro liquid channels evenly distribute liquid flow for improved heat dissipation An automotive grade sine wave generator is used to drive the pump motor. This ensures electrical noise and vibration are kept to a minimum. It is also AEC-Q100 certified according to Automotive Electronics Council’s standard so it has great quality and durability. Automotive grade radiator is used so it has excellent anti-corrosive properties and can easily survive harsh elements that includes vapor, liquid, grease, solvent. Included PWM fan has unique ribbed edge fan blades that suppress air turbulent noise with geometry optimized for both air flow and pressure. This ensure maximum performance with lowest possible noise.
PF240-ARGB Water block includes a pump with multi chamber design that isolates hot and cold liquid channels to prevent heat bleeding, thus making it more effective at removing heat away from the water block. The pump motor utilizes three phase, six pole design for smoother, quieter operation compared to most single phase, four pole design. Energy efficiency also improves as well. 0.2mm micro liquid channels evenly distribute liquid flow for improved heat dissipation An automotive grade sine wave generator is used to drive the pump motor. This ensures electrical noise and vibration are kept to a minimum. It is also AEC-Q100 certified according to Automotive Electronics Council’s standard so it has great quality and durability. Automotive grade radiator is used so it has excellent anti-corrosive properties and can easily survive harsh elements that includes vapor, liquid, grease, solvent. Included PWM fan has unique ribbed edge fan blades that suppress air turbulent noise with geometry optimized for both air flow and pressure. This ensure maximum performance with lowest possible noise.
PF240-ARGB Water block includes a pump with multi chamber design that isolates hot and cold liquid channels to prevent heat bleeding, thus making it more effective at removing heat away from the water block. The pump motor utilizes three phase, six pole design for smoother, quieter operation compared to most single phase, four pole design. Energy efficiency also improves as well. 0.2mm micro liquid channels evenly distribute liquid flow for improved heat dissipation An automotive grade sine wave generator is used to drive the pump motor. This ensures electrical noise and vibration are kept to a minimum. It is also AEC-Q100 certified according to Automotive Electronics Council’s standard so it has great quality and durability. Automotive grade radiator is used so it has excellent anti-corrosive properties and can easily survive harsh elements that includes vapor, liquid, grease, solvent. Included PWM fan has unique ribbed edge fan blades that suppress air turbulent noise with geometry optimized for both air flow and pressure. This ensure maximum performance with lowest possible noise.
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The lowest price for Seagate Exos X18 ST12000NM000J - Hard Drive right now is $503.75 at TechCart, compared across 15 retailers.
The all-time low was $239.32 on 11 Feb 2026 — today's price is 110% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 9 June 2026.
