In my app i store some data in the device storage. This data is stored in the application support directory.
The path of the directory, as i saw, include my Application Id.
Can the Application Id change?
Is it possible that changing the provisioning (when the old provisioning will expire, and i would like to load a new version the application) will change the Application Id?
The application ID is connected to the ID you registered on the provisioning portal. The certificates expire, but the IDs do not. You can easily create a new certificate with the same ID.