It has happened to many people. You go on holiday and snap away to your hearts delight only to find you have lost one of the memory cards that held those precious memories. I needed a back up of some sort and did a lot of research. After reading many reviews I settled on the Nexto DI Extreme model. It is an attractive package in a gold coloured textured metal case measuring 128x77x23mm. There is a small LCD screen on the front so you can see what it is you are doing. A single button operates the device with a series of short and long presses to navigate the menus. In reality it works pretty well. It can act as a back up to your photos, a mass storage USB device or a hard drive for a camcorder. The device has card slots on the top edge and the left hand side edge and takes all the common memory card formats. There is an internal Sata hard disk which has very fast performance and makes the device one of the fastest out there. The hard drive comes in different sizes and this is reflected in the price. I opted for the 320gb version which set me back £160. This may sound a lot but it has had constant use and never failed me once. The fact that the device will check each bit of info as it copies it and then verifies it 100% so that you know all is well really is a great feature. It will also warn you if you insert a corrupt card or if any files on the card is corrupt.. Using the device is simple. You turn it on and insert a card into one of the slots. You are then giving the choice to copy or move the images onto the card and once all is verified you can either format the card or turn the device off. You are able to browse files and delete them on the hard drive as well. It is also possible to copy files from a external source that has a USB connection and the cable is included for this. The hard drive has a rechargeable battery that takes about 4.5 hours to charge from the mains or using a USB cable to a PC. I was able to transfer 10 2gb cards on a recent trip and there was still plenty of battery power as indicated on the LCD screen. When not in use the battery holds charge for many months so the hard drive is always good to go. Now I have discovered the Nexto I never leave home without it when travelling. It is compact and weighs around 225g and has it's own protective soft case. Takes up little room in a camera bag so there is no excuse to leave it behind.