Hi guys, could u pls suggest me if there is an hardware that I could buy so that I coud transfre videos from the iphone 3gs to an external sd card ?

I bough a devide called zoomit, but it ucks becaue :

1) it powers up with ts own battery and I got a wrong unit, because it does NOT charge its battery..I have to return it..

2) it is incredibly slow to transfer files....I have to transfer video files from the phone to an exteral sd card, so I need something fast.

Please , any help ?

I need something portable.
What about :

1) OTG had disks ?

or

2) can this work to move videos from the iphone to the sd card ?

http://iphone.mythailandblog.com/201...onnection-kit/

Some other hardware suggestion pls ?
Thank you

As far as I know there aren't any devices allow external memory for the iphone. I remembered seeing a case that did have an extra sim card I believe but I can't remember when it was called.