Unless you don't have a good Internet connection, use of a mirror is recommended, especially if you plan to install a graphical desktop environment.
Ma yella ur tesɛiḍ ara tuqqna n internet igerrzen, aseqdec n tisit ilaq, aṭas ma yella teheyyaḍ ad tesbeddeḍ tawennaḍt n tnarit tudlift.