Backup CF cards with no computer

Hi,

I use a very simply setup with a regular external HDD and a USB Hub connected to my Smartphone. I use this on all my trips to back up SD cards each day and if you allready have an external HDD this only costs approx. 10$

Only has the disadvantage that it requirres power supply for the hdd.

Description and image are available on my Blog:

http://www.andreasbank1980.blogspot.de/2012/08/on-go-image-backup-for-10-only.html

Cheers,

Andi