Transcend Storejet 25H3 1TB USB 3.0 Review and Teardown

Portable hard drives are becoming more and more popular and readily available to us than ever before. Most of us rely on these portable hard drives to store our files and regardless on how important these files are, it’s still important that we store these on a dependable hard drive, because we never know when we will use these files in the future. 

We now have a vast variety of different kinds of portable hard drives in different form factors. Some brands choose to go with the slim, smooth and modern look while others go for a more rugged, durable and robust look. 

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A simple accidental slip can cause damage to a hard drive potentially damaging or corrupting the files inside, so this important factor should be taken in consideration when choosing what type of hard drive you need to get. With that being said, Today, we are going to take a look at the Transcend Storejet 25H3, a military grade shockproof hard drive and we are going to take a look inside it literally to see the structure that makes it durable and shockproof.

transcend storejet 25h3 review


Pros: Military Grade Shockproof, Affordable, One button backup and reconnect

Cons: Bulkier than most modern portable hard drives

Is it within Our Target Budget?: No


Military-grade shock resistance*
Fully Compliant with the Hi-Speed USB 2.0 specification
Advanced 3-stage shock protection system
Durable anti-shock rubber outer case
Advanced internal hard drive suspension system
Quick Reconnect Button – after safely removing the hard drive from the system, press to reconnect the drive without having to unplug and replug the USB connector again
One Touch Auto-Backup button**
256-bit AES file & folder encryption**
Exclusive Transcend Elite data management software

**Transcend Elite software is required for this function.

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Size 1TB/2TB: 131.8mm×80.8mm×19.0mm (5.19″ x 3.18″ x 0.75″)
3TB/4TB: 131.8mm×80.8mm×24.5mm (5.19″ x 3.18″ x 0.96″)
Weight 1TB/2TB: 197g (6.95 oz)
3TB/4TB: 298g (10.51 oz)
Operating Voltage USB DC 5V
Operating Temperature 5°C (41°F) ~ 55°C (131°F)
Storage Media 2.5″ SATA HDD
Certificates CE, FCC, BSMI
Connection Interface USB 3.1 Gen 1 (backward compatible with USB 2.0)
Power Saving Mode 10 mins
One-Touch Backup Yes
Note *Based on U.S. military drop-test standards MIL-STD-810G 516.6. The drop test performed in non-operating state does not guarantee the invulnerability of this product under any circumstances. More information about Transcend’s MIL-STD test can be found here.

Transcend StoreJet 25M3 VS 25H3 – What’s inside a shockproof hard drive?

Note: read the full article below for the things that weren’t mentioned in the video. 


Design and construction:

The design of the transcend storejet 25H3 boasts a rugged look with notches on its side providing more grip and stability while handling this portable hard drive. It’s entirely covered with a thick rubber enclosure as it’s first layer of protection with the exception of the part where the one-touch button is located.

how to open transcend storejet 25h3 - rugged design

It has a smooth rubbery texture at the top but on the other side, it has a pattern texture that ads up to it’s grippy feel making sure it’s not going anywhere. You may need to exert an effort to actually have this hard drive slip from your hands for sure.

At this side we’ll also find the capacity which is 1 terabyte, serial number, and where this hard drive was made from.

how to take apart a transcend storejet - pattern design

In front we have the USB port which is a USB 3.1 Gen 1 compliant so it will take full advantage of the speed of the hard drive inside. We’ll take a look inside later to check what specific model and brand the hard drive inside is.

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The specifications tells us that this hard drive weighs around 197g but I was curious and have a weighing scale lying around so I checked it out myself. So it looks like the weight of this hard drive is actually 217g give or take. I think it doesn’t matter at this rate, it was just cool to actually test it out.

transcend 25h3 review - actual weight

Now, let’s move on to tearing this guy apart shall we?

It would be interesting to see how this hard drive is structured grabbing the U.S. military drop-test standards MIL-STD-810G 516.6. which is for shock proof.

Removing the first layer of protection which is the rubber enclosure is pretty straight forward, just pull it off at one side revealing the second layer of protection which is the hard case.

what's inside the transcend 25h3 - rubber enclosure

Before we proceed, I highly suggest you don’t do this on your own hard drive as it will definitely void your warranty unless of course, if it’s already expired. 

So opening the hard case requires removal of three screws, 2 at the top and one on the bottom. Once the screws are removed, you need to peel of the warranty sticker and start prying the hard case off using a credit card or something similar.

After opening the hard case you will see the third layer of protection which is another rubber enclosure that covers the edges of the hard drives that comes in contact with the hard case. The rubber enclosure doesn’t cover the entire hard drive providing a little bit of breathing space for heat to dissipate prolonging the lifespan of the hard drive. The hard drive inside is a 1 terabyte western digital 5400Rpm 8Mb Sata 6 Gb/s hard drive.

transcend storejet 25h3 teardown

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Transcend Software:

The transcend storejet 25H3 comes with its own applications that you can use for recovering deleted files, low-level formatting, encrypting files, syncing bookmarks and scheduling backup.

transcend storejet 25m3 vs 25h3 - applications

transcend storejet 25h3 vs 25m3 - programs

transcend 25h3 vs 25m3 - transcend elite data management

Speaking of back up, it has a one-touch backup button that doubles as a quick reconnect button as well. So if you safely remove the hard drive from windows and planning on reconnecting it again in the future, you don’t have to remove the cable, you just simply push the button and it will automatically reconnect.

what inside the transcend storejet 25h3

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First of all, I apologize for the lack of drop test and speed test on this review because this particular hard drive like my other transcend storejet hard drive has all of my important backup files inside and dropping this is not a very good idea. Also, it’s already a couple of years old so doing a speed benchmark on this would not be fair as well. I also think that most of us will not get this for its speed but for the fact that it’s durable and a very reliable portable storage. If you’re looking for a faster storage then you might want to checkout other options such as a more expensive SSD portable hard drive. With that being said, I would definitely recommend the transcend storejet 25H3 because I feel like it’s a very good value for money and that securing your files in a durable storage space is the most important thing.

Like I said, this hard drive has aged pretty well with me and it’s still working with no hiccups whatsoever. I don’t need to baby this one during traveling because I know it can handle a couple of bumps and bruises here and there. It’s a military grade hard drive for a reason and that alone warrants a confidence that this hard drive can withstand some beating. A quick disclaimer though as the hard drive inside is a mechanical hard drive that has moving parts on it that is subject for its own wear and tear so this being a shockproof hard drive can’t save it from being faulty at some point in the future. So there’s that.

I love transcend shockproof hard drives so much that I also got it’s slicker brother, the Transcend Storejet 25M3. I did a guest post for sir Jullian of the for the review and teardown of the 25M3 so click here to learn more and see how it compares to the 25H3.


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