@rgboy:
rgboy wrote:I woke up in the morning and BUM. Files were no longer on my drive.
Files do not just "disappear" - there are several possible reasons why they may not be visible now, on that drive. Unfortunately your problem description is not detailed enough, for me to understand
exactly what you did to transfer the files onto the "problem"(?) drive, and how you know that they definitely were written to that drive in the first place.
So you can certainly try the good advice given already in this thread - but there could be more to this situation, depending on the details which you haven't given so far... (filesystem health, drive health, copying procedures used, etc. etc.)
P.S. You could also consider whether the original camera flash media would be another possible source, for recovering the "missing photos".