Easy transfer problem

I used the easy transfer and it required 3 disks. When I went to reinstall it
the program is wanting 4. I am not sure if errored in the transfer or if the
program was the problem. In any event I cannot get any information off the 3
disks that I have. Without having the 4th it only closes down the transfer
process.

Does anyone have any idea if there is another way of recovering the data
that is on the 3 disks that I have?