Ditto....I am going to detail my situation below... in hopes that it may help someone else.
I bought an HP Simplesave 320gb portable hard drive to back up all of my computers and my flashdrives. My flashdrive crashed so I was using the backup....then, my portable hard drive crashed....it became inaccessible...the error message that appeared kept asking me to format disk because my disk was unformatted. Fortunately, I knew to click CANCEL instead to avoid losing all of my information.
I ran a (5 hour) diagnostic test on my hp simplesave via Western Digital which gave results including an error saying there were some bad sectors found that may be able to be repaired. I did not click repair and clicked cancel because I was advised (by very helpful and honest Western Digital employees) that there was only a 50/50 shot that this would work and there was a possibility that it could even cause further irrepairable damage increasing the probability of not being able to recover my data. I tried free software to no avail; because the drive could not be detected.
I came acrosss this posting and tried R-Studio and "Wallah."
I was able to download the R-studio demo which gives a preview of all of my files and allowed me to recover up to 64kb for free (which isn't much; kilobytes are less then megabytes or gigabytes). I was not able to see the size of the files recovered but an error message popped up when the maximum limit was reached (I was able to view and open the recovered files immediately). After recovering the 64kb of files, I was told which versions of their products I could purchase to recover my remaining files; (for my specific situation) these ranged from 49.99-179.99 and the installs for these are good for one machine only and cannot be transferred; but, can be continually used on that machine. I opted to go with the 79.99. which allows me to save unlimited amounts of data. I received the registration code immediately after submitting my credit card information. The recovery process took me about 20 minutes all together. The manual can be found at the same site the download is made from; this helped me figure out how to use it.
I highly recommend this software....the money was worth it. After I have had time to look over all of my recovered files, I'll attempt to repair the drive just to see what happens. Then, I'll send it back to the company for a free new one (but will be much more cautious this time
).