I work at a small business with 4 computers running autocad 2008 and cadworx 2008. All of the computers are connected to a Gigabit network switch which is then connected to a NAS. The dwg files can have somewhere of 120 x-refs, and whenever I open the xref manager the computers then lags whenever I try and edit x-ref in place and also with saving. The problem doesn't happen if the dwg files are on the computer itself and not on the NAS. What is my best solution. If you need more information let me know.