Can't Access Share on Mac from Windows 8 Machine

I have a Windows 8 Pro machine (not updated to 8.1) that I need to access a share on a Mac running OSX 10.7.  I have other shares on the Mac that this Windows machine can view and edit.  The Windows user has an account on the OSX machine.  The only difference in this share and another is the share in question is USB.  Not sure if this matters.  

When I try to access the share in question I receive some errors about not having permissions.  If I create a drive mapping using different credentials the same problem occurs.  At some point I received errors stating the share was already created.  When I did a net use from command line I see some of the shares were mapped but when checking my computer no drive mappings were available.

Windows 8 machines are in a homegroup named WORKGROUP same as the Mac's.  There are a total of two Windows 8 machines.  Both are having the same issue.  They can access some files on the Mac share but those shared from the USB drive aren't accessible.  They can be seen but can't be connected to.  Thanks in advance.