You now have the option of scanning additional media for use by the package manager (apt). Normally these should be from the same set as the one you booted from. If you do not have any additional media, this step can just be skipped.
Tura tesɛiḍ taxtiṛit n usmiḍen n umidyat-nniḍen i useqdec n umsefrak n ukemmus (apt). Yewwi-d ad ilin seg widen yettusbadun iseg tesnekreḍ tazwara. Ma yella ur tesɛiḍ ara akk amidyat-nniḍen, amecwar-a tzemreḍ ad as-tanfeḍ.