Impressive Brentford hit five in front of 5263 fans to march into the second round of the FA Cup.
The game was only really a contest for the first 15 minutes as being dominated from the off and took the lead in the fifteenth minute.
The goal came from a spot kick after a Staines defender handled after a Bees Corner. McCormack step up and slotted home with confidence in front of the 940 travelling Staines Town fans.
Having taken the lead, the Bees continued to push forward, determined to extend their lead.
Reeves scored the Bees second after playing some brilliant touch passing with Trotta with a lot shot that left the Staines keeper floundering.
Two minutes later, Griffin Park was again on its feet, this time applauding a great strike Harris which.
The youngster on loan from Cardiff, turned and ran down the left wing before striking the ball superbly with his right foot that left the Staines keeper no chance.
With the game won in the first forty five minutes the tempo of the second half appeared to be a lot calmer.
Trotta scored the Bees fourth with a powerful header over the keepers head from some distance.
The Bees still created chances but these all amounted for nothing until the 90th minute when Donaldson made it five with a back heal during a goal mouth scramble