mám v telefonu paměťovou kartu zformatovanou jako přenosné úložiště
Na přenosné úložiště nelze instalovat aplikace. Je potřeba naformátovat jako Internal storage.
You can use micro SD card in Android Marshmallow with two options:
Internal storage (aka adoptable storage in Android Marshmallow). You can use micro SD card in Android Marshmallow as internal storage to expand internal storage. You can save anything on the SD card. Please read this guide on how to use micro SD card as internal storage.
Portable storage. You will use the micro SD card mainly to save your media files or backups. You cannot install apps to it. Most apps will not use it for their app data. Please read this guide on how to use micro SD card as internal storage.
