[Zubersoft]

So I was answering your question just from the perspective of file management - not from how to set up your libraries. Moving files will not change anything in MobileSheets itself (other than the files failing to load). You need to move the files into the correct location first (and make a copy if you want those files separated by library), then switch the library in MobileSheets, then tap Import->Local File and then you can select all of the files in the subdirectory you created. This will reimport those files into the second library. This will not include any annotations, metadata or any other changes you made in the primary library. If your goal is to duplicate all of the data in the app between the libraries, that is not currently supported and is a more complex topic. I can provide instructions for all that if needed, but it's going to involve having to start over with a clean slate. The easiest way to handle that in the future will be when I add isolated storage between libraries (which is going to place the files for each library under a subdirectory named after that library) which is planned for either a 3.9.X release or 3.10.0.

Mike