Uprading to windows 10 will format my pc?

[Tomer80095]

(and to save space and not to make another post -) when does windows 10 officially come out?

 

[Rhezner]

it will come out in almost exactly a month. It will keep all of your files and folders

 

[USAFRet]

July 29.
And most of your other questions answered here: https://www.microsoft.com/en-us/windows/windows-10-faq

 

[Daedaly]

(and to save space and not to make another post -) when does windows 10 officially come out?

July 29th. And all your stuff stays. It's updating your OS, not your PC