HDD Raw Copy is a straightforward tool for duplicating or backing up storage devices.
The program works at a very low level, just copying sectors from your source to the destination drive, or an image file (raw -.img - or compressed -.imgc - images are supported). And this simplicity has its advantages, because it means it means the program can work with all drive and storage types (IDE, SATA, SCSI, USB, Firewire, memory cards, more), from all manufacturers, regardless of their file system.
This does also mean you have to think carefully about how you might use HDD Raw Copy, though. If you want to duplicate a USB stick, for instance, it's best to use drives of similar capacities. Because otherwise, if you copy a 4GB image to a 16GB drive, say, that will also then appear to have a 4GB capacity, and you won't be able to use the remaining space without repartitioning.
And in addition, the interface is rather basic, being designed for simplicity rather than features. You can manually have the program create a backup image of a drive in just a few clicks, for example, but there's no scheduling option to automate the process.
Still, HDD Raw Copy is probably one of the smallest and simplest drive cloning tools we've seen, and if you don't currently have a program to handle this particular function then it probably deserves a place somewhere on your system.
As drive copying tools go it's not exactly packed with features, but as HDD Raw Copy is also small, portable, easy to use, free, and works with just about anything, it more than deserves a 4-star rating.