Backups are very slow

Hi All,

I'm using BE 2012 and I have to backup my file shaers which are resieds in a NAS box. All together I have 1.5 TB (Approx) data to be backed up. Those data are replicted by using Symantec CPS from remote file servers. Backup job for these files were run at around 600 MB/min. Very slow. Is thre a way to have bit more higher rate?

Regs,

Sachitha.