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Mediasonic > 
Item#: N82E16817576014

Mediasonic ProBox K32-SU3 3.5" Black SATA I/II/III USB 3.0 SuperSpeed SATA HDD External Enclosure

  • 3.5"
  • USB 3.0
  • Up to 4TB
  • Email this page
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Mediasonic ProBox SuperSpeed External Hard Drive Enclosure can instantly convert your 3.5" SATA hard disk drive to an external drive and provides a portable plug-and-play solution for both PC and Mac. The transfer rate is up to 5 Gbps via USB 3.0 and 480mb/sec via USB 2.0 connection.  The external drive provides the portable storage space for your music, photo, video, and data file.

  • newegg Convert 3.5" HDD to USB Storage Mediasonic ProBox SuperSpeed External Hard Drive supports all 3.5" SATA I/II/III hard disk drives up to 4TB and converts them to external USB storage drive for more convenient data transfer.
  • newegg USB 3.0 Interface SuperSpeed USB 3.0 delivers up to 5Gbps bandwidth which is around 10 times the bandwidth of the current USB 2.0, allowing for ultra-fast transfers of high definition movies and videos, as well as various other large capacity file formats. USB 3.0 is also Plug and Play and backward compatible with USB 2.0 /1.1 components.
  • newegg LED indicator This External Hard Drive Enclosure features a LED indicator to indicate power and data transfer status.

Learn more about the Mediasonic K32-SU3




AC Adapter
Internal Interface
External Interface
USB 3.0
Maximum Capacity (per Bay)
Up to 4TB
Partition Format: Master/Single

AC Power Adapter:
Input: 100V ~ 240V - 0.7A, 50/60 Hz
Output: 12V - 2A

USB 3.0 SuperSpeed (Backwards compatible with USB 2.0 / 1.1)

Maximum Transfer rate up to 5 Gbps via USB 3.0

Maximum Transfer Rate up to 480Mbps via USB 2.0

Support all 3.5" SATA I / II / III hard disk drive up to 4TB

Support UASP

Removable inside tray for easy installation

LED Light Status indicators

Plug and Play for PC/Mac Platform

On/Off Power Switch


Operating Systems Supported
Microsoft Windows XP / VISTA / 7
Mac OS

Dimensions & Weight

174(W) x 114(L) x 36(H) mm


Package Contents
K32-SU3 Enclosure
USB 3.0 Cable (1M)
Power Adapter
Vertical Stand
Screws for HDD

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Mediasonic K32-SU3

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  • Richard A.
  • 3/2/2015 4:02:57 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsDo not use with XboxOne

Pros: Cheap

Cons: Cheap.

Enclosure has issues documented all over the web with it disconnecting and or powering down. Originally bought to use with XboxOne but it goes on and offline constantly.

Did you find this review helpful? Yes No

  • Robert M.
  • 11/21/2014 5:42:34 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsShort Life

Pros: Small, fast, simple

Cons: The enclosure worked perfectly for about 2 or 3 weeks and then it began acting up and actually creating issues on my laptop. When plugging the device in my laptops entire USB bus would reset (all devices show as disconnected and reconnected) and on numerous occasions it would require a reboot of my machine.

Other Thoughts: During my testing I removed the drive and placed it in another enclosure which worked fine so as to eliminate the hard drive as being the issue.

Did you find this review helpful? Yes No

  • Anonymous
  • 9/1/2014 2:57:10 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsLasted 1.5 yrs

Pros: * worked when it worked
* pretty fast transfers up to 150MB/s over USB 3.0
* worked with up to 4TB drives

Cons: * annoying power down and spin up on its own every time PC wants to access any drive in OS
* started acting up after I upgraded mobo from Z77 to Z97 then Probox died

Other Thoughts: * Lasted 1.5 years
* Pretty much worth its price if you need something inexpensive quick
* It's not perfect and won't last forever so think twice before getting it

1 out of 3 people found this review helpful. Did you? Yes No

  • Albert N.
  • 8/9/2014 9:15:00 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

5 out of 5 eggsGreat Easy-to-use Enclosure

Pros: Simple, Easy to setup, Easy assembly

Cons: Heat has gotten to be an small issue, the system runs the HDDs at max speed instead of running them at a low speed until accessed for work. No power save function when turning off main computer but that's why they have the switch...

Other Thoughts: Overall, i am very happy with the product it performs well under heavy loads while editing video. The vibration is minimal in the vertical position and they have not crashed once since using them.

1 out of 1 people found this review helpful. Did you? Yes No

  • Joseph F.
  • 3/30/2014 11:35:05 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsMediasonic Probox

Pros: Removed old Falcon drive from enclosure and placed in this enclosure. Worked just fine and added USB 3.0 capability. USB 3.0 enclosure accesses data alot faster than when it was in the other enclosure.

Cons: None

Other Thoughts: Could have included a sata port, but with USB 3.0 being the staple now probably not an issue.

1 out of 1 people found this review helpful. Did you? Yes No

  • Roger F.
  • 12/27/2013 1:16:39 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsmediasonic K32-SU3

Pros: easy to set up, works great, for the on sale price of $19.99 its the only affordable SATA III solution, my first one I bought spring of 2013 to use with the 2TB WD drive from a MY BOOK external that was cr*p & after 3 RMA's with WD still had the same problem, I use this for movie & video storage & editing it is connected to my network using it in USB 2.0 mode only it runs 24/7 & has not had one problem in 7 months, it has been reported that some drives may spin down all the time, mediasonic has a firmware update on their website to fix this.

Cons: LED on wrong end, no felt pads for feet, I like to lay my drives flat for safety as I have cats & kittens & don't want it knocked over so I bought 4 felt stick on pads to put on the bottom to absorb any sound & vibration through the desk, it would have been nice to have the LED on the other end as I like to hang the wires down the back of my desk hidden out of the way but would still like to know the state of the drive, these things would have cost them an extra .10 to .25 cents at time of production to have a perfect item rather than a good item

Other Thoughts: I have now ordered a second one at the sale price to build another 2Tb storage drive & would by another if needed

1 out of 1 people found this review helpful. Did you? Yes No

  • Michael F.
  • 12/4/2013 5:30:03 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsnot up to par

Pros: it works?

Cons: only saw transfer rates of 40MB/s which is FAR under what usb 3.0 should be able to do. very dissapointed

Other Thoughts: for the most part the thing is fine. functions. just not fast. not usb 3.0 fast. not even usb 2.0 fast. and didnt like it required an external power source

0 out of 6 people found this review helpful. Did you? Yes No

  • Anonymous
  • 7/1/2013 5:07:51 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsWorked great, sometimes

Pros: Worked great when it connected, but always seemed a bit finicky on which USB ports it would work in. At first I thought it was my laptop's fault, but...

Cons: it got more picky over time, after about 6 months, it stopped working with any USB ports.

0 out of 1 people found this review helpful. Did you? Yes No

  • Roger F.
  • 6/15/2013 1:27:39 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsOk for temp use

Pros: easy to put together, recognizes WD 2TB Green SATAIII drives (even though it will only transfer at SATA 2.5 rate), has single voltage wall transformer ( not garbage brick style) can lay flat if desired.

Cons: no felt or rubber feet to stop vibration, not full sata III 6.0 transfer speed, unit has spin down problem with some WD Green drives, manufacturer has released a firmware update but that simply keeps the drive spinning all the time even when the pc is off (I want a reliable enclosure that simply spins up when I power up the pc & spins down when the pc shuts down) as I use it for a media center & the drive is kept in a different room from the HTPC, what I have is a $10.00 peice of china Junk that will burn out my drive before its time by keeping it spinning 24/7

Other Thoughts: I bought this to replace a WD My Book with a spin up on power up problem they could not solve, first off I had to copy all my files off first cuz WD encrypts their external drives now without telling the user or giving them an option even if they choose not to secure the drive it is still encrypted, bad because if your WD enclosure dies you only have 2 options to retrieve your data, you can either buy another external drive the same model & swap the hard drive or you can send it in to WD for expensive data recovery. you can not simply put the drive into another enclosure or a desk top PC as the encrypted partition will not be visible or accessible |& you may end up deleting the partition in the process like I did & have to place it back in the WD enclosure & use "partition guru " to recover your files. so this enclosure works ok for what I need it to I will run it till the drive dies cuz I am through with spending extra to get it running properly after 3 warranty replacement "WD My Book" drives none of which solved the problem this enclosure is not perfect but will do the job @ a good price.

0 out of 1 people found this review helpful. Did you? Yes No

  • Thomas W.
  • 5/27/2013 9:05:21 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggsDoesn't transfer at SATA III/6.0 speed!

Pros: Nice case, although pretty plasticy. Drive installation was easy. VIA VL700 bridge controller supports 3TB drives properly.

Cons: This enclosure uses the VIA VL700 SATA to USB 3.0 bridge chip, which means it only works up to SATA II speeds. In fact, this is mentioned on the product packaging, which is visible in the product description. Shame on me for not zooming in and double-checking! I don't know why Newegg is so inaccurate with their product descriptions! Just read the package! I'll keep the enclosure anyway, since the Seagate 3TB drive I'm using in the enclosure isn't fast enough to get up to SATA III speeds even though it's a SATA III drive.

Other Thoughts: The maximum USB 3.0 transfer speed of this enclosure is about 189 MBytes/sec read/write. This is slower than a proper SATA III to USB 3.0 bridge chip like the ASMedia ASM1051E, which is TRUE SATA III/6.0 (it will do about 260 MBytes/sec). The test was performed with a 256GB Samsung 830 series SSD and a late model MacBook air with USB 3.0 running Blackmagic Disk Speed Test.

5 out of 5 people found this review helpful. Did you? Yes No

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Item#: N82E16817576014
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