Camera says insert sd card before taking photos but I have already inserted the sd card and formated it as internal storage
I have exactly the same issue, my 64G card ceased working last week, I think the Nokia 5 blew it. I bought another 32G card, but Nokia 5 can't format it. Or says the card is 'slow' which is untrue. The Nokia 5 phone is completely screwed now, no app that uses internal storage works any longer. Camera, email attachments, WhatsApp images - none of them work because phone says there is an issue with storage.
same issue here
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