Hi Tom,

You don't give any details of which model  MacBook Pro.
If its a 17" Thunderbolt MBP 2011 it is the ExpressCard 34 slot

A read of the manual will tell you what each slot and port does. It came with 
the computer.

Cheers,
Ronni

Sent from Ronni's iPad

On 28/03/2012, at 8:11 PM, tom samson <thefr...@iinet.net.au> wrote:

> I have a Macbook Pro and there is a Card slot on the left side. It has never 
> been used. My question is what could the best way be to use it. I am really 
> thinking about plugging in a semi permanent sd card as a digital drive but 
> the cards sit proud of the port So what else is there.
> 
> tom samson
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