I recently bought a new ADATA external Classic hard drive 500 GB. I have transferred around 29 GB of data on it till I install my new Windows 7 operating system. After some work with the hard drive (copying / deleting ... files). I closed it for some reason and it couldn't open again asking me to format. I don't want to format the hard drive, I have important data I need. Is there a way I can retrieve my data? Is Recover My Files program from GetData a right choice?
Part 2 of my question: Why might such thing happen (require format to open), is it the hard drive problem or is it just a corrupted file or folder?