Well as it says , take all your computers in your house or wherever you live and add up their hard drive space
i have
1 Dell desktop =80GB
1 custom build =40GB+120GB+60GB
1 Laptop =60GB
so i have 360GB
my laptop 80GB,
my desktop 160Gb,
family desktop, 120Gb,
2 X spare hardrives 60Gb
My old laptop 20GB,
My G/F's computer 160Gb,
My mums laptop 60Gb,
My External 250Gb,
Server 1 - 500GB
Server 2 - 80GB + 30GB
My laptop - 60GB
Brother's laptop - 60GB
External Hard Drive - 300GB
Downstairs computer - 120GB
All USB pens together - 10GB