All data gone on My Book Studio II

I am in the same situation, cannot find any data on the My Book Studio, this is ridiculus.

I am also using Maverick I wish I never upgraded.

If this does not get resolved soon I will never buy WD product again, even though up till now I have had no problem in the past, but I have not got the time or patience to put up with this. I am running a business and now I cannot get some files, just great