HI, I HAVE PURCHASED A

HI, I HAVE PURCHASED A HI SPEED USB 2.0 EXTERNAL HARDRIVE (500GB) PART NUMBER SP-U35/500, AND HAVE REGISTERED IT ONLINE. IN THE BOX IT OFFERES FREE 2G ACCOUNT ON MYFABRIK.COM AND WHEN I WENT TO SET UP AN ACCOUNT IT ASKS FOR A SERIAL NUMBER FROM THE PRODUCT - TO GET THE FREE 2GB, HOWEVER I HAVE NO IDEA WERE TO FIND THE SERIAL NUMBER ON THE PRODUCT OR THE BOX? I HAVE ENTERED EVERY POSSIBLE NUMBERS I FOUNF ON BOX ND ON PRODUCT THT ARE (VISABLE WITH THE NAKED EYE). THERE ARE NUMBERS OR LETTERS -OR BOTH- UNDER A VERY SMALL BAR CODE ON BACK OF THE DRIVE- HOWEVER THERE IS NO POSSIBLE WAY TO READ THEM-THEY ARE EXTREMLY SMALL. PLESE ADVISE ANY HELP IN THIS MATTER

THANK YOU
BRIAN HARVILLA