1) English obviously isn't your first language and you are clearly having a hard time getting your issue out. It might be a lot better if you go to a forum in your native (or a fluent) language and ask the question there.
2) How much data do you need to store?
60GB is the bare minimum as a boot drive and will hold almost nothing except windows.
120GB will hold a windows and a few programs/games.
with either the 60/120 you'd probably want a standard hard drive for additional storage.
A 240GB is the smallest I'd want as the only drive in a system, or as the boot drive in a heavier use system (gaming or work system with many programs)
Beyond 240/256GB I don't recommend as it's cheaper to get a 120/240 SSD and a 1TB+ data drive
250 is best now in terms of cost/performance
120 is fine for almost any user.
Yesterday I've set up two machines with Windows 7 64bit and half of Creative Suite + Office and utilities. After switching hibernation off it's still 25GB free on 60GB (55 actual) drive.