As far as I know, your admin friend is smoking crack. There is no difference in the SMB protocol between 64 and 32 bit Windows. Now between Windows 2003 and 2008 there might be a difference ...

I have a customer who is using RoboCopy to backup their file son a server. It has been working fine and then after upgrading some of their computers from XP to Windows 7 we started getting Access ...

The GUI is fine if you're only moving a few files, but for larger and more complex migrations, this built-in Windows utility is the way to go. There are many ways to get a file from Point A to Point B ...