Cannot copy files from a WD external drive to a Mac

Hi,

I saved a lot of folders containing photos from a Casio camera and also PDF files to a WD external hard drive from a laptop using Windows Vista.

When I connect the hard disk to my Mac I can see the files and open them but I am unable to drag and drop the files to the desktop or copy and paste them.  If I drag and drop or copy and paste the folders appear on the desktop  but they are empty.

I can open a PDF and then save it to the desktop but I do not want to have to do this with thousands of individual files.

I really need to copy everything to the Mac can anyone help?

Thanks

A drive formatted for Windows is read only on a Mac. I don’t know about Macs see if this helps 

http://community.wdc.com/t5/WD-Portable-Drives/unwritable-drive/td-p/435872 see post 6.

Joe