WD My Book 1TB not only want backup but as main storage instead of my main hard drive

i want to not only use it as a backup device but i want to store most programs and files on the My Book and keep my internal lower on usage etc.

Do i need the SmartWare program? Can i just reformat and set up partitions?

i have win7 32bit dell inspirion 1721

amd 64x2

can anyone help me please? i would love and appreciate any advice or suggestions.

Thank You