The SSD Review published a review on the MyDigitalSSD Pocket Vault SSD
A quote from the article:
Size is everything in the world of SSDs and first hand proof of this can be seen in any number of ultrabooks, including the Apple MBA. True ultrabook size can only be accomplished through mSATA or M.2 SSDs. Much is the same with external storage where we have seen size reduced significantly, while performance has jumped exponentially with the introduction of UASP and SuperSpeed. Not so long ago, we looked at the MyDigitalSSD OTG External USB 3.0 SSD that was 256GB in size and displayed performance of 449MB/s. This external solution used a mSATA SSD to accomplish its performance with SuperSpeed.MyDigitalSSD Pocket Vault SSD Review @ The SSD Review