A NFR specifying that contacts managed by the user should be saved and backed up locally and restored next session (as long as the data is not corrupted) is missing, and is highly relevant given that the application is a contact book and contact saving is important.
A NFR specifying that contacts managed by the user should be saved and backed up locally and restored next session (as long as the data is not corrupted) is missing, and is highly relevant given that the application is a contact book and contact saving is important.