http://www.lexar.com/echo/echo_se.html

I am thinking to buy this so I can backup my Memory Card if full during a shoot
and then format and shoot some more.
Is this safe and good idea to do with this?
Can you do it from Camera out USB to this gadget?

Would you do it , or is it safer to wait ,come back to studio backup on HD?

I also think maybe can be useful during travel.

Make sure it doesn't corrupt raw files.  I once had a mobile backup hard drive with card reader from Vosonic (one of the earlier versions) for dumping my CF card on the drive. All raw files were corrupted, Nikon NX or photoshop couldn't read them anymore.  The 3 cards/files i transferred to the device were completely  lost.
Needles to say I returned the device to the store the day after and replaced it with a newer version that didn't corrupt my raw files.

Patrick.

I agree it doesn't make sense. You can buy cards of equal capacity for less and use them as back up or use them as primary cards for your camera. More options this way.

yes, i see now, no point.
 better to buy mem card,  you don't risk loss.
also no time wasted doing backup transfer.

You can buy cards of equal capacity for less and use them as back up or use them as primary cards for your camera.

How do you back up a memory card on another memory card?

I have a Jobo Gigaone, 40GB capacity, it's a HD with a card reader. It doesn't have the viewer sjlocke's has. I don't know if they still exist though (bought this 3 years ago).

I use a Dell Studio laptop for all my image processing and when I get a chance I check the images on a 'proper' monitor.  I find that I need the screen at the right angle, the same at which I calibrated it using Windows 7 calibration tool.  Not perfect, but works for me.