After reinstall window, what is the procedure to recover the sync folder?

10. November 2013 · Write a comment · Categories: Hotmail, Outlook.com · Tags: ,
My exist window 7 have to reinstall later,
I using SkyDrive client and the sync folder path is on C:/ (the OS partition).

I move all the file to external harddisk, and format C:/, install new Window 7 OS.
When i install the dropbox client back, the file will download immediately.

So how can i recover my sync folder?
I thinking just copy and paste my file from external harddisk to the sync folder.
But do dropbox client will treat that is new file and sync to server? or make any conflict?

Please help.