>>/XF - exclude file (list any files you don't want copied/mirrored)
>
>Have you found a way to exclude more than one file? If yes, what would be the delimited character to use between each of them?

In addition you can exclude entire folders. eg

This line copies an entire drive and excludes the recycle bin and the system volume information

robocopy d:\	U:\1710\Win7\Backup\%dow%\d\ *.*  /z /mir /xa:s /XD $Recycle.Bin "System Volume Information"  /log:c:\tmp\Backup_log\_%dow%_d_u.log /TEE /np