We look at this post next.
We progress from free, free to try to data recovery houses.
But let me share I don't use this method. I use DropBox.
I am travelling at the moment and am putting my photos on a external hard drive. I just put the hard drive into a new computer and when I went to view the files I could see all the folders for about 5 seconds though a generic, non-specific icon was given not the normal folder icon and then they all disappeared. The space that it took up on the hard drive is still not free, so are they hidden/lost? Is there a way I can get them back?