Master containers hold metadata with each version of a reporting obligation. These are for example "Solvency II 2.0.1", "Solvency II 2.1.0", "Solvency II 2.2.0", "Pension Funds 2.1.1 PWD", "CRDIV 2.6", "CRDIV 2.7", etc.
After successful selection of the package (see section Select a licensing package), it will request the user to select a folder to store master containers. Users can select the default location to store containers and click "OK".