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SanDisk Z400s

SanDisk Z400s
alaScore 89

84 reviews

Dec, 2017

alaTest has collected and analyzed 84 reviews of SanDisk Z400s. The average rating for this product is 4.2/5, compared to an average rating of 4.5/5 for other Solid-state drive for all reviews.

We analyzed user and expert ratings, product age and more factors. Compared to other Solid-state drive the SanDisk Z400s is awarded an overall alaScore™ of 89/100 = Very good quality.

Review analysis

(Based on 84 reviews)

1 expert reviews

User Reviews  


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Consumer review by: ( review summary for SanDisk Z400s


alaTest has collected and analyzed 1 user review of SanDisk Z400s from The average user rating for this product is 4.0/5, compared to an average user rating of 4.5/5 for other Solid-state drive on

100% of the reviews on give this product a positive rating.

This summary is based on the products: SanDisk Z400 2.5-Inch 128 GB SATA III Solid State DriveSanDisk Z400 2.5-Inch 128 GB SATA III Solid State Drive

Dec, 2017

Expert review by: Chris Ramseyer (

SanDisk Z400s SSD Review


SanDisk has the exclusive on Silicon Motion's SM2246XT controller. What's more, we got our 128GB Z400s for just $.25/GB. But is this a true low-cost contender, or just a cheap SSD?

At $44.99, the Z400s is a very low-cost SSD. It's at least five times faster than a hard drive with random data and has consistent sequential performance under light workloads

The Z400s is also much smaller than a hard drive. Performance isn't everything, unless it's either a lot of performance or a lot of capacity

I really liked the Z400s 128GB at 25 cents per gigabyte. I don't know what happened to that price, but it appears to be gone now. At $44.99, the price is still low compared to many of the other products on the market. However, there are some drives...

Dec, 2015

Consumer review by: David (



Easy upgrade to existing HDD. Worked first time. Fast!

Nothing yet!

May, 2017

Consumer review by: Neil (



Very fast replacement for a HDD in an old laptop

Would have liked a laptop sata adapter included

Mar, 2017

Consumer review by: Michael (



My first experience of a M.2 SSD drive. It was a 5 minute job to install. Couldn't be easier.

Nothing about the drive itself. Had a bit of configuring to do with the BIOS and Windows 10 to get it work.

Mar, 2017

Consumer review by: Gareth (



Nice speedy drive, put it in an old netbook and it's given it new life.

Aug, 2016

Consumer review by: darran (



I was a bit sceptical when I saw the price but i really didn't want to spend a lot of money on an old laptop. Put it in my dell Inspiron 1564 and it's really brought it back to life. The hard drive runs like a charm. Great hard drive to run your...

Jun, 2016

Consumer review by: Daryll (



Small, great for a C drive, doesn't use a SATA channel. Only gave 1 for reliability, as I've only been using it for 24 hrs so far!

Jun, 2016

Consumer review by: Dave (




Nothing as yet

Jun, 2016

Consumer review by: Martin (



Replaced hard drive in Macbook A1181 with great results.

May, 2016

Consumer review by: PAUL P. (

Solid, inexpensive drive.


Comes with only the SSD, nothing else, so if you need a height adapter for installing into a device, such as some laptops and other applications, you will need to get that separately.

Low price. I only need this for a network gateway running pfSense, which uses FreeBSD and doesn't require much in the way of performance from a drive. This fits the bill. Has threaded metal fastener holes on sides and bottom.

None, really, other than for a drive at this price, expectations shouldn't be too high, although if purchasing as an upgrade from HDD, it should provide a noticeable improvement in performance, though another $10-15 might get yet a better drive.

May, 2016

Product Specifications


Certification:FCC, UL, TUV, KC, BSMI, VCCI
Colour of product:Black / Black, Green / Blue / Green
Internal: Yes
SSD form factor:2.5" / M.2

Operational conditions

Non-operating shock:1500
Non-operating vibration:4.9
Operating shock:1500
Operating temperature (T-T):0 - 70
Operating vibration:5
Storage temperature (T-T):-55 - 85

Other features


Packaging Data

Manual: Yes
Quick start guide: Yes


Data Transfer Rate:6
Mean time between failures (MTBF):1750000
Random read (4KB):17300 / 32900 / 35500 / 36600
Random write (4KB):10600 / 21700 / 43300 / 69400
Read speed:279 / 546
Solid-state drive capacity:128 / 256 / 32 / 64
Solid-state drive interface:M.2 / mSATA / Serial ATA III
TBW rating:20 / 40 / 72
Write speed:128 / 182 / 342 / 48 / 94


Power consumption (read):1.2 / 1.6
Power consumption (write):1.3 / 1.5 / 1.9 / 2.6

Technical Details

Form factor:M.2 2242 / M.2 2280
Non-operating shock:1500
Non-operating vibration:4.9
Operating shock:1500
Operating temperature (T-T):0 - 70
Operating vibration:5
Storage temperature (T-T):-55 - 85

Weight & Dimensions

Depth:10.1 / 2.2 / 2.98 / 4.2 / 5.08 / 6.99 / 8
Height :2.23 / 3.5 / 3.82 / 5.08 / 7 / 8
Weight:30 / 4.1 / 5 / 5.5
Width:10.1 / 2.2 / 2.23 / 2.98 / 3.82 / 6.99