MyDigitalSSD BP4 mSATA SSD Review (240GB) – Best Value Available For an SSD To Date

BP4 FeaturedPerhaps one of the hottest tech items to hit in the last year is the ultrabook, a laptop typically measuring under 1/2″ thick, weighing less than 3 lbs, having performance as high as 1GB/s transfer speeds and being capable of up to ten hours battery life.

As new and amazing as the ultra is, the consumer also learned of the solid state drive and, more specifically, the mSATA SSD measuring 1/3 the size of a credit card, just over 3mm thick and weighing just under 7gm.

As with any other new technology, such things as storage capacity are considered premium and, even now, we are seeing systems sell for as much as $500-$750 more, simply the result of a storage upgrade from 120 to 240GB. The smart consumer is one who buys the lower capacity system with full intent of upgrading the SSD themselves and, in doing so, saves themselves hundreds of dollars.

If you are one of these consumers, you have come to the right place because our SSD analysis today is on the newly available MyDigitalSSD BP4 240GB mSATA SSD, this SSD quite possibly being the best value for the money on the market right now.

BP4 Label FrontBus Card


The BP4 is a SATA 3 mSATA SSD measuring only 49x31x3mm and weighs about 6 grams in total. The picture on the right above depicts the SSD on my business card.  This SSD is available in capacities of 30, 60, 120 and 240GB and performance specifications are listed at 550MB/s read and 520MB/s write transfer speeds.  The BP4 comes with a limited three year warranty and any removal of the front branding sticker will automatically void that warranty.

A quick check of Amazonblank shows availability of the 60, 120 and 240GB capacities at prices of $59.99, 99.99 and 179.99, respectively.  This puts the BP4 at under $1/GB and a check of the internet shows the 240GB capacity as being the lowest price for a similar capacity anywhere on the web.


The MyDigitalSSD BP4 SATA 3 mSATA SSD contains the Phison PS3108-S8 controller, much the same as the previous generation BP3 that we reviewed, and the memory has been upgraded to the newer Toshiba 19nm Toggle Mode NAND flash memory (TH58TEG9D2HBA89) from the previous size of 24nm.  There is also a NANYA DRAM DDR3-1333 256MB Cache module on board.

BP4 PCB Front

Total RAW capacity of the BP4 is 256GB (64×4), however, MyDigitalSSD has overprovisioned this drive to provide for sustained performance and endurance and it is being marketed as a 240GB capacity SSD.  Once formatted, there is 224GB storage available for consumer use.

BP4 PCB Back


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    The 60GB model sounds very nice as an Intel SRT drive on my Gigabyte GA-Z77-DS3H.

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    How come your CrystalDiskMark 3.0 results vary so much from what is advertised on MyDigitalSSD for the 240GB BP4, in particular your 4K write of 74.55 is only 54.36 on MyDigitalSSD?

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    It still looks like Crucial CT256M4SSD3 256GB m4 makes better choice though. At leaset with amazon UK prices – I see it is more expensive in US, lol.

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    is the 120gb much slower? what would be an estimate % of performance loss? thanks

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    Typo. . .”MyDigitalSSD sold there version at a better price than ADATA did the SX300.”

    “sold their” ??

    Any chance you recorded the bytes per sector? if we’re coming from a 512 and this is a 4k, we can’t clone. 🙁

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