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Sonnet’s Multimedia Memory Card Reader & Writer ExpressCard/34 is a Simply Fast™ solution for moving files between your electronic devices’ memory cards and your notebook computer’s hard drive, with no cables required. This handy device works with the most popular memory card formats, including SD (Secure Digital), MMC (Multimedia Card), XD-Picture Card™, and all their variations—wide compatibility enables you to work with memory cards used in devices such as digital cameras, cell phones, MP3 players, digital picture frames, and more!

Wonderfully small, the Multimedia Memory Card Reader & Writer ExpressCard/34 adapter inserts flush inside your MacBook Pro or Windows notebook’s ExpressCard slot so you can store it there when it’s not in use. Its ingenious design enables it to accept all the compatible memory cards through a single slot—just push the card in. When you’re done transferring files to or from the memory card, just push it in further, and it pops out. Imagine transferring photos, data, games and music files to and from your memory cards—without cables, without another gadget to pack, and without draining batteries—at speeds up to 480 Mbits/s!


Key Features

Reads from and writes to all SD(1), MMC, and xD-Picture Card memory cards

Compatible with MacBook Pro and Windows notebooks with ExpressCard slot

Fast file transfers between memory card and computer without cables

Adapter inserts completely into slot with no protrusion—may be left in all the time

Plug and play—no drivers to install(1)



Part No.  
MMRW-E34 Discontinued
Warranty 1-year
Form Factor ExpressCard/34 computer card
Bus Interface ExpressCard/34, USB interface
Media Connector Type Push/push media card connector
Data Transfer Rate Up to 480 Mbits/sec
Dimensions (WxDxH) 34 mm x 75 mm x 5 mm
(1.34" x 2.95" x 0.19")
RoHS Compliant Yes
Packaging Contents
  • Multimedia Memory Card Reader & Writer ExpressCard/34 Computer Card
  • Documentation


Specifications subject to change without notice.





Mac Compatibility

MacBook® Pro (with an ExpressCard/34 slot)

OS X® 10.4.11+(1)

OS X El Capitan compatible

Windows Compatibility

PC notebook (with an ExpressCard slot)

Windows® 10, 8, 7, Vista®, XP(1)


Technical Notes

  1. When used with a MacBook Pro, Sonnet's Multimedia Memory Card Reader & Writer ExpressCard/34 requires the following to support SDXC cards: Mac OS X v10.6.5 or later.
  2. When used with a Windows laptop, Sonnet's Multimedia Memory Card Reader & Writer ExpressCard/34 requires the following to support SDXC cards: Windows 7, or Windows Vista, or Windows XP with the installation of extended File Allocation Table (exFAT) file system drivers, available here.

Mac Logo Windows Logo ExpressCard/34 Logo roHS Logo

Buzzillions Rating

Perfect Card Reader for Your Mac (or PC)
This is a solid quality product that works great. Before I purchased this card, I was using the USB connection directly to the camera. This card transfers the pictures much quicker and works seamlessly like any other external drive.

I have not had problems with this card, but have experienced customer support from Sonnet Technologies on another ExpressCard/34. Their tech support is fast and extremely helpful. I highly recommend this product AND this company."


Buzzillions Rating

Where Have You Been All My Life!
This ExpressCard/34 reader is amazing, I use it everyday. Before I had to hook up my camera every time i wanted to move pictures to my MacBook Pro. It fits perfectly inside the machine and sits flush against the body.

The best part about this card is that it just stays inside the machine everyday because it is that efficient.

What is great about it is that I no longer have to use an ugly external card reader for my pictures. I can upload on the go with no problems whatsoever.

It does exactly what it says it will, and will add that missing element to any laptop without an SD card reader."


Buzzillions Rating

Great Device for Digital Photographer
I plugged it into my MacBook Pro ExpressCard/34 slot and the SD card was immediately recognized. I can leave the card in the slot. It does not protrude so it is good to go."

Awards & Case Studies
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