So I guess it's the lack of a USB 3.1 port or the driver or maybe just Sony screwing over Lexar users? I don't get it, the USB 3.0 is supposed to go up to 640Mb/s in the dream world so I expected at least 250Mb/s in the real world. I then plugged my Seagate Backup SSD drive into the same port and can write the same file at 70Mb/S and read the file at about the same 70Mb/s on average with a burst of 140Mb/s for the first half of the file.Īt this point I am scratching my head and wondering if the reader needs a specific driver so I start reading and see one or two mentions of a driver but the link for the driver was not easy to find and when I did find it the page is not operating properly because you just cannot select an OS and the download.

I then put a Lexar SD 64Gb x1000 card in the Sony and I get about the same performance, it actually was a tad bit faster than the XQD which was surprising. The read speed of the same file starts off at 150Mb/s for the first 100Mb and then drops to 60Mb by the end of the transfer. I then put in my Lexar XQD 64gb 2933 card in the unit and wrote a 2gb file to the card and the transfer speed starts slow the moves up to about 36Mb/S on average. The unit was auto detected and drivers installed without a problem. I just got the Sony MRW-E90 dual reader and I have tried it on two PC's running Windows 7 (64bit) with USB 3.0 ports.

Sony xqd card reader windows