For informational purposes, yes, Clonezilla will clone the drive. It has a fallback if it doesn't recognize the filesystem (which depending on what filesystem your Amiga drive is formatted in, it may actually be able to read it). The fallback uses dd, which will just do a byte copy, and output to an image file.
Or of course you can use dd, or pretty much any software for creating an image, though a lot of these have the limitation of needing to move it to something of equal or greater size.
Also;
http://www.amazon.com/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3AIde%20To%20Usb%20AdapterI've found mine to be invaluable, especially for doing this sort of thing.
slaapliedje