You may use a data recovery program
R-Undelete. You can try it for free in its Demo mode, in which it can perform any data recovery operation, except saving recovered files larger than 64k. What is important, you may preview files without recovering them to estimate recovery chances.
You may read more on how to use R-Undelete to recover your files in its
on-line help. Your case is "Recover lost files from a deleted logical disk".