We tried to make OpenKM as intuitive as possible, but an advice is always welcome.
Forum rules: Please, before asking something see the documentation wiki or use the search feature of the forum. And remember we don't have a crystal ball or mental readers, so if you post about an issue tell us which OpenKM are you using and also the browser and operating system version. For more info read How to Report Bugs Effectively.
The repository path is a single mounting point, you can not split repository in two or more folders, for it should be needed source changes in the datastore manager class, what takes control on the location of the files in the file system.