All my pictures and videos got deleted from my android phone somehow, and now my sd card is not being recognised by my phone. I am also unable to unmount or format my sd card to get it to work. What should I do?
What make card? How large? What make and model phone? (When you turn the phone off the card is automatically unmounted, When you turn the phone on the card is automatically mounted. So if you want to try the card in a computer, turn the phone off and remove the card.)
If a card won't format in a device (phone, tab or computer) that can format other cards, it's most likely a bad card. You can save money when you buy the card or you can buy a SanDisk and not have problems they won't take care of.