For those of us fortunate enough to have a MacBook Pro with an ExpressCard/34 slot, there’s been one minor drawback – the cards almost always stuck out from the side of the MacBook Pro in an ugly protuberance, making it both odd-looking and difficult to fit in a bag without removing the card.
OWC’s Slim ExpressCard to eSATA Adapter changes things quite nicely. This card fits inside the ExpressCard/34 slot such that the eSATA port sits flush with the edge of the MacBook Pro, which means you can leave it installed, even when you’re not using it. It doesn’t require any special drivers, so you can just slide it in and go. It’s even bootable, so you can start your MacBook Pro up from an external drive, should you so desire.
Of course, we don’t need to go into the details of how much an advantage eSATA has in performance over FireWire 800 and USB 2.0. However, if you want some specifics, you may want to check out Lloyd Chambers’ latest review over at Mac Performance Guide.
If you want the short version, though, I think this quote from the article sums it up nicely.
The flush-fitting OWC Slim ExpressCard at about $28 is a total no-brainer buy to improve performance with any drive that supports eSATA. Driver-less and bootable too!
So if you have an external drive with an eSATA port, a MacBook Pro with an ExpressCard/34 slot, and a desire to increase your data throughput, then the OWC ExpressCard to eSATA Adapter is just what you’re looking for.