Since you're a newcomer to the Mac, see these:
Switching from Windows to Mac OS X,
Basic Tutorials on using a Mac,
Mac 101: Mac Essentials,
Mac OS X keyboard shortcuts,
Anatomy of a Mac,
Switching to Mac Superguide, and
Switching to the Mac: The Missing Manual, Lion Edition.
Additionally, *Texas Mac Man* recommends:
I'm having a similar problem; however, my hard drive has already been reformatted to FAT32.
The WD hard drive was previously used on a PC; I reformatted it a few months ago. Everything was working fine, yet a few days ago an error message started popping up when I would connect the drive saying "Mac OS X can't repair the drive....Reformat the drive..." yada yada--and now it's read only.
So, my question, do I really have to reformat it again??? What would I reformat it to?
Of course, if there exists a way to avoid having to relocate all my files (for hours), that'd be great.
Any help is most appreciated!