Error Copying File or Folder the path is too deep

I answered this once, do not know what happened to post, so at risk of being redundant:
Windows has a limitation where the entire path to a file cannot be over 255 characters. Microsoft has a command line copy program called "Robocopy" (Robust Copy) that can copy files without this limitation. This utility can be found in the Resource Kit Package. Try using this program to copy your files.
http://www.microsoft.com/download/en/details.aspx?displ...

Microsoft's explanation is in the following article:

"Naming Files, Paths, and Namespaces"
http://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx#maxpath

Also note that a large GB file cannot exist on a FAT-formatted volume. Make sure that your destination volume is formatted as NTFS.