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frontpageEragorn | Staff posted Jun 15, 2026 07:40 PM

4-Bay TERRAMASTER D4-320 External Hard Drive Enclosure (USB 3.2 Gen 2, Diskless)

$152

$190

20% off
+ Free S&H at Newegg
34 Comments
15.5K Views
Get Deal at Newegg
Deal Details
TERRAMASTER OFFICIAL STORE via Newegg has 4-Bay TERRAMASTER D4-320 External Hard Drive Enclosure (USB 3.2 Gen 2, Diskless) on sale for $151.99. Shipping is free.

Thanks to Deal Hunter Eragorn for sharing this deal.

About this product:
  • 4-bay DAS enclosure supports SATA HDDs and SSDs up to 120TB total
  • USB 3.2 Gen2 Type-C interface delivers up to 10Gbps transfer speeds
  • Tool-free drive trays w/ push-lock design and hot-swappable bays
  • Compatible w/ Windows, macOS, Linux, Thunderbolt 3, and Thunderbolt 4
  • Temperature-controlled cooling fan and low-noise operation below 21dB(A)

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Store:
    • You can view Newegg's Return Policy here.
  • Additional Information:
    • This offer matches our popular front page deal from March 2025 which earned over 35 thumbs up.
    • Our research indicates that this deal is $19 less (11% savings) than the next best available price from a reputable merchant with prices starting from $170.99 at the time of this posting.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by Eragorn | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
TERRAMASTER OFFICIAL STORE via Newegg has 4-Bay TERRAMASTER D4-320 External Hard Drive Enclosure (USB 3.2 Gen 2, Diskless) on sale for $151.99. Shipping is free.

Thanks to Deal Hunter Eragorn for sharing this deal.

About this product:
  • 4-bay DAS enclosure supports SATA HDDs and SSDs up to 120TB total
  • USB 3.2 Gen2 Type-C interface delivers up to 10Gbps transfer speeds
  • Tool-free drive trays w/ push-lock design and hot-swappable bays
  • Compatible w/ Windows, macOS, Linux, Thunderbolt 3, and Thunderbolt 4
  • Temperature-controlled cooling fan and low-noise operation below 21dB(A)

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Store:
    • You can view Newegg's Return Policy here.
  • Additional Information:
    • This offer matches our popular front page deal from March 2025 which earned over 35 thumbs up.
    • Our research indicates that this deal is $19 less (11% savings) than the next best available price from a reputable merchant with prices starting from $170.99 at the time of this posting.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by Eragorn | Staff

Community Voting

Deal Score
+53
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Top Comments

slippydealer
429 Posts
77 Reputation
Anyone looking at this, make sure you're looking for a DAS and not an NAS. This is a DAS.

For those that don't know the difference, a DAS is basically just a external enclosure for drives, without networking or file server capabilities of its own. It needs to be attached to a computer or NAS in order to do anything useful. An NAS, on the other had, runs its own OS, connects to the network, serves files, etc. all by itself.
topherlooks
18 Posts
10 Reputation
I've had this attached to a Mac Mini for the past year acting as the storage for my Plex server. Reasonably quiet itself and hums along 24/7 without any problems so far. The only thing I'd mention, and I'm not sure if this is the fault of the Terramaster or something else, but I have it plugged into a UPS along with the Mac Mini and it doesn't behave correctly after a power cut. The Mac and DAS don't lose power or restart due to the UPS but something is interrupted because the drives in the DAS start going into idle mode and waking up at random until a power cycle of the DAS and Mac.
Azrael_the_Cat
5169 Posts
801 Reputation
Um, no CPU, no memory. Does that help? it's not a computer, it's just a box with a circuit board containing either 4x USB to SATA bridges and a USB hub, or 1x or 2x multiport SATA to USB bridges.

for this product the interweb says it has 4x ASMedia ASM235CM chips and an internal USB hub.
TLDR; it's not a NAS.

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34 Comments

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Jun 16, 2026 01:03 AM
429 Posts
Joined Aug 2008
slippydealerJun 16, 2026 01:03 AM
429 Posts

Our community has rated this post as helpful. If you agree, why not thank slippydealer

Anyone looking at this, make sure you're looking for a DAS and not an NAS. This is a DAS.

For those that don't know the difference, a DAS is basically just a external enclosure for drives, without networking or file server capabilities of its own. It needs to be attached to a computer or NAS in order to do anything useful. An NAS, on the other had, runs its own OS, connects to the network, serves files, etc. all by itself.
Last edited by slippydealer June 15, 2026 at 06:16 PM.
14
Jun 16, 2026 01:55 AM
10 Posts
Joined Nov 2009
tigerkurtzJun 16, 2026 01:55 AM
10 Posts

Our community has rated this post as helpful. If you agree, why not thank tigerkurtz

Would this be good to attach to a NAS as a backup? (Part of a larger backup scheme)
1
1
Jun 16, 2026 03:29 AM
5,169 Posts
Joined Feb 2006
Azrael_the_CatJun 16, 2026 03:29 AM
5,169 Posts
Quote from tigerkurtz :
Would this be good to attach to a NAS as a backup? (Part of a larger backup scheme)
Sure that would work.
Jun 16, 2026 04:41 AM
542 Posts
Joined Sep 2014
jk_blackJun 16, 2026 04:41 AM
542 Posts
Quote from tigerkurtz :
Would this be good to attach to a NAS as a backup? (Part of a larger backup scheme)
That's one of a very few reasons to attach this to NAS. Just don't add these to your main array. I have done that without knowing too much a few years ago, and now I regret it. Although this DAS has been running quite well without any issue, a single disruption of USB or power to this DAS could drop all 4 drives at once. And you better have 4 parity drives at that point… yeah… I am moving them back into a larger server case now Frown
Jun 16, 2026 11:02 AM
18 Posts
Joined Oct 2014
topherlooksJun 16, 2026 11:02 AM
18 Posts

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I've had this attached to a Mac Mini for the past year acting as the storage for my Plex server. Reasonably quiet itself and hums along 24/7 without any problems so far. The only thing I'd mention, and I'm not sure if this is the fault of the Terramaster or something else, but I have it plugged into a UPS along with the Mac Mini and it doesn't behave correctly after a power cut. The Mac and DAS don't lose power or restart due to the UPS but something is interrupted because the drives in the DAS start going into idle mode and waking up at random until a power cycle of the DAS and Mac.
1
Jun 16, 2026 02:30 PM
2,071 Posts
Joined Feb 2021
AquaGalley8616Jun 16, 2026 02:30 PM
2,071 Posts
I have 3-4 4-bay DAS'S and so far one of them is plugged into my MAC MINI m4. I use alexa to turn on and off my DAS saying "alexa turn on the 4-bay", and in about 30 seconds, it shows all 4 drives of the DAS in desktop, ready to use. But I should add this, my DAS is turned on maybe 1 hour a month, and off the rest of the time. I transfer/backup stuff from my 4TB external NVMe to the DAS ... and move stuff I want to have on the NVMe over to PC. This saves wear and tear on Mech drives. I have Plex Server on my MAC MINI m4, and I have 2 NVMe 4tb crucial drives from my Mac Mini m4. Everybody had to decide what options are available for you.
I have around 8 14TB enterprise drives empty ... waiting to be filled up. I bought the drives and DAS's before the AI SCAM started. I went to seagate page yesterday and they were selling a 28TB drive for 850 dollars, (before AI Scam I bought 2 of the for 240 dollars a piece). If you have drives to fill the DAS's go for it. I'm set for the future buy low (it is hard to know what is low, so I luck out buying my DAS and hard drives at good time). Now is not the time.
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1
Jun 16, 2026 06:48 PM
1,076 Posts
Joined Jul 2006
c0bra99Jun 16, 2026 06:48 PM
1,076 Posts
I've had this for a bit over a year, using it with OpenMediaVault running in a ProxMox VM. I've had not issues with it losing connectivity or anything like that

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Jun 16, 2026 07:07 PM
148 Posts
Joined Nov 2018
AnneR4868Jun 16, 2026 07:07 PM
148 Posts
Quote from topherlooks :
I've had this attached to a Mac Mini for the past year acting as the storage for my Plex server. Reasonably quiet itself and hums along 24/7 without any problems so far. The only thing I'd mention, and I'm not sure if this is the fault of the Terramaster or something else, but I have it plugged into a UPS along with the Mac Mini and it doesn't behave correctly after a power cut. The Mac and DAS don't lose power or restart due to the UPS but something is interrupted because the drives in the DAS start going into idle mode and waking up at random until a power cycle of the DAS and Mac.
FWIW, this houses data banks for one of my Plex Media Servers which is connected to a Beelink MINI S12 Mini PC Intel 12th Lake N95---for about a yr. Both are powered through a UPS. We have frequent brown-outs with occasional outages, but I haven't noticed any issues.
1
Jun 16, 2026 07:21 PM
219 Posts
Joined Oct 2017
huehueJun 16, 2026 07:21 PM
219 Posts
I have the D8. Awesome little thing, and crazy fast with usb c 3.2. Use a short cable and you'll get the max speed out of it. Cant tell its not directly plugged into the motherboard with typical use
Jun 16, 2026 07:41 PM
486 Posts
Joined Dec 2007

This comment has been rated as unhelpful by Slickdeals users.

Jun 16, 2026 07:47 PM
486 Posts
Joined Dec 2007
adnjJun 16, 2026 07:47 PM
486 Posts
Quote from AnneR4868 :
FWIW, this houses data banks for one of my Plex Media Servers which is connected to a Beelink MINI S12 Mini PC Intel 12th Lake N95---for about a yr. Both are powered through a UPS. We have frequent brown-outs with occasional outages, but I haven't noticed any issues.
Yes. I do something similar. All of my Plex media is manually mirrored to drives connected directly to my PC server. I keep another array with the original media connected to a different PC. That setup allowed me to easily recover a few Tbytes that became corrupted on the mirror array. .
Jun 16, 2026 08:30 PM
12,448 Posts
Joined Oct 2004
eibgradJun 16, 2026 08:30 PM
12,448 Posts
Quote from c0bra99 :
I've had this for a bit over a year, using it with OpenMediaVault running in a ProxMox VM. I've had not issues with it losing connectivity or anything like that
Anyone know the internal (unpublished) specs for this thing? CPU, memory, etc.? If I bit on this, I'd probably do the same, but I'm reluctant unless I know the specs are worth the trouble. I assume it's pretty anemic given the manufacturer's intended usage.
1
Jun 16, 2026 08:39 PM
5,169 Posts
Joined Feb 2006
Azrael_the_CatJun 16, 2026 08:39 PM
5,169 Posts

Our community has rated this post as helpful. If you agree, why not thank Azrael_the_Cat

Quote from eibgrad :

Anyone know the internal (unpublished) specs for this thing? CPU, memory, etc.? If I bit on this, I'd probably do the same, but I'm reluctant unless I know the specs are worth the trouble. I assume it's pretty anemic given the manufacturer's intended usage.
Um, no CPU, no memory. Does that help? it's not a computer, it's just a box with a circuit board containing either 4x USB to SATA bridges and a USB hub, or 1x or 2x multiport SATA to USB bridges.

for this product the interweb says it has 4x ASMedia ASM235CM chips and an internal USB hub.
TLDR; it's not a NAS.
2
Jun 16, 2026 09:41 PM
77 Posts
Joined Jan 2018
CaesarOfSaladsJun 16, 2026 09:41 PM
77 Posts
I've been using one of these for a couple of months for some extended and non-important data. Works great and don't seem to have any connectivity issues.

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Jun 17, 2026 12:12 AM
1,472 Posts
Joined Feb 2008
likenewJun 17, 2026 12:12 AM
1,472 Posts
Is there a version that has connection ports for IDE hard drives, but sata to connect newer slow drives, ssd's and so on? Bring all of my old hard drives into one mega bay!

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