I think you have misunderstood the torrent file with the actual data file. You may be thinking that the small files which by default have been downloaded on your desktop are the actual data files,which just need to be converted into a suitable format. Further, you may be assuming that once a suitable converter software is found, and the files are converteed, the small files on your desktop will swell up and you will get a file of size 600 mb.
Actually Torrent files(the small files on your desktop) are just the links which will help you download the actual data.In simple words they are only the roads through which actual data will travel.
So click on the small files and move on for the onward journey.
Remember, a file of 600 mb, say a movie or anything else, when downloaded on to a PC will always show the size of 600 mb, when the download is complete, and not a file of 350 kb or else.
