It's the smallest 1GB USB memory stick that I've found. And, that's because it's the size and shape of an SD card. And, that's because it *is* an SD card!
This means that you can use it in your Treo 650 and/or your Canon SD400 as a standard SD memory card and then (after hinging part of the card down) plug it into your computer's USB port to transfer pictures or data.

Yes, it really works and I've had no problems with the USB connection even though it doesn't have all of the bulk of the normal USB plugs.

The only drawback is that it is a little wide when plugged into the USB port, so it may prevent adjacent USB ports from being used at the same time.

This replaced my existing SD card and eliminated my need for two other devices: my SD card reader and my USB keychain memory stick.

This card also comes with a slim keychain holder so that it doesn't get lost in your pocket if you don't have a phone or camera.

I have one of these and it does amazing things for me.

You never when u will need something such as this tech tool.

Sandisk makes highly reliable, very fast flash memory

Smart (via Damefoten)

These are a good idea, but the durability of the folds would always be a concern.

Just flip the flap on the card and this thing transforms from an SD to a USB. No need to carry USB cables just to transfer your pictures or music to your PC.