We recently highlighted TeraCopy in a roundup of tools that can help you add Windows 8's best features to Windows 7, and our love still hasn't waned.
TeraCopy replaces Windows' default file copying system. This super software brings all your simultaneous transfers into a single dialog box, speeds up your file swaps, and adds a handy pause option.
The real icing on the cake, however, is the way TeraCopy skips over troublesome files and saves them for your perusal at the end of the transfer. No longer will a single in-use file send your massive folder transfer grinding to a complete halt.