The app "My Tests" - this is a good opportunity to develop their skills, improve memory and prepare for exams in the main tasks of which is incorporated testing. In this application, there are options to create, edit, and delete, as well as passing the tests. Create a quiz you can save on the media to continue to share them with your friends.
To use the "Export" and "Import" functions of the file containing the test, you must give permission to the application to use the device's memory or to make sure that such permission already exists for the application in the system (in the device itself, not in the application settings). An example of setting this item in the system: Settings - All Applications - "My Tests" - Permissions - enable access to the device’s memory (this setting may differ depending on the Android version or depending on the system shell).