I have just got myself an android phone. and I have just found a way to back up my camera to the phones memory card.
Step 1: Items Needed
to do this you will need.
your android phone.
Usb data copier ( I used a syncbox)
usb card reader. (or camera and usb cable)
and some memory cards.
Step 2: How To
plug your usb stick, camera or card reader in to the left hand usb socket on the usb syncbox.
connect your phone to the right hand usb socket as shown.
on the android phone set it to usb drive mode.
this can be selected from the notification bar at the top of the screen.
then select Mount.
Or you can use the mountusb software which makes this easier.
press the copy button on the syncbox and your files will be copied from your camera to your phones memory card.
open the folder sync001 which has been created on your phones memory card.
and you will see your files.
I use ES file explorer to browse files on my android phone.
Step 3: Extra Notes
I have tried doing this using a memorex travel sync. But So far I unable to get the travel sync do work with the android phone.