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Windows.old contains your User Folder which have these folders Documents, Downloads, Google Drive etc.

No, it doesn't, or darn well shouldn't.

XP put that data in \Documents and Settings\<user>. Vista and 7 put it in \Users\<user>, and some stuff in \ProgramData.

If you've got user downloads and documents in \Windows (and thus \Windows.old), you're doing something really strange.

You appear to be under the impression that windows.old is a based on the windows folder.

It's not.

Those were moved to "c:\Documents and Settings" then c:\Users a long time ago.