I was using an western digital external hard drive to store (not back up process) images, video, music etc from a windows XP machine. I upgraded to windows 7 machine and could see the files on the wd external hard drive. I then used windows 7 back up facility and now can't see my old files although the memory size indicates they are still there. I've tried Recuva but it just sees the windows 7 back up files and ignores the files I want. I've tried plugging the wd into an xp machine but that only sees the windows 7 back up files. Any suggestions as to how I can see the old files or recover them without paying too much?