How do I format the card with my camera

Aug 2, 2018
2
0
10
I bought a new card for my Canon 70 D and my G7X. I unlocked the card with the slider. Still, the message is Card cannot be accessed. Reinsert or change the card. Help!
 
Solution
Look carefully at the switch as most cards are not shipped with the switch in the locked position.
What happens if you try to read the card with a computer? Still show it as locked?
MERGED QUESTION
Question from missclaudiamoss : "New card can’t be accessed???"