Do I have to redownload all my Cloud files after a Windows reinstallation?

Hi people,

Title says it all.

Reinstalled Windows and have 100 GB of files in the Cloud.

Those exact same 100 GB of files are on my HD.

But when I install CC on my new Windows installation and login, it starts downloading that 100 GB.

Not so happy with that since I have a slow connection in my student house 🙂

Can't I tell CC that the files are already here on my HD?

Thanks a million,

Joseph