I can't be 100% certain as I don't have apps that use an iCloud Drive directory accessible to other apps, but I think (at least on Windows 7) the "iCloud Drive" folder is found in your user profile directory, which can be reached by selecting your user name from the standard Windows 7 start menu, or by using Win+R to bring up the Run dialogue and typing "%userprofile%".
I'd love to know if anyone can confirm this though.
Comments
I think it's in your user profile folder
I can't be 100% certain as I don't have apps that use an iCloud Drive directory accessible to other apps, but I think (at least on Windows 7) the "iCloud Drive" folder is found in your user profile directory, which can be reached by selecting your user name from the standard Windows 7 start menu, or by using Win+R to bring up the Run dialogue and typing "%userprofile%".
I'd love to know if anyone can confirm this though.