It is not a USB drive. It is a card reader that connects to a computer through USB port. It is for reading some kind of card, but wasn't the right size for my camera memory card. Here are the details from Amazon where I bought it: Ideal for portable use on the road or at home with a desktop or laptop. Your data and pictures can be instantly transferred to your PC/Notebook. AC power adapter not required. Power can be drawn from the USB port. * Easy - plug-and-play! * USB - Common Universal Format! * Transfer pictures from your CF memory card to your computer! * No need to connect your camera to your computer via USB cord and waste camera battery transferring pictures! * Card reader powered by USB port, no cords. http://www.amazon.com/gp/product/B002Z5T176/ref=oss_product#moreAboutThisProduct (Personally, I think this description is somewhat misleading because the card slot is too wide for my photos card and I think it is a pretty universal sized card.)