In the “Files” menu you will find an overview of your Excel files. At the top right you can add new files. The number of possible files is not limited.
Create a corresponding file here for each file you want to write or read.
Please note:
If you want to write to a file, it must not be open at that time. If you open the file in Excel, for example, DataSuite will not have write access to the file and data cannot be written.