How to recover deleted files from removable hard drive

Recently, because the home computer is always a problem, and loaded a server in the above, usually rarely used, there is nothing to store the data I will not put in the computer, so I bought a mobile hard disk, in case of a rainy days, after all, like we do the site of people, usually most likely to involve such data backup. Just unexpectedly, stored in the mobile hard drive will also be an accident.
This is not, yesterday because to use the file inside the mobile hard disk, so the mobile hard drive connected to the computer, because my computer chassis in front of the interface a bit of a problem, I switched to the back of the socket, but a back, shut down the time I forgot! When I got up the next day to tidy up my computer's garbage, Also forget such a thing! When cleaning garbage, also do not know how to do, will this mobile hard disk some files as garbage to dispose of, until I need to use these files later, only to find no traces, but now how to do? This has been removed from the thing, can easily find it?
Fortunately finally found on the internet this call Dragon Data Recovery software tools, try to use a bit, did not expect the role of this software is really big, and back and forth, but the operation of three steps, I lost all the data recovered. It took about 20 minutes and it was quite efficient.

How to recover deleted files from removable hard drive