Why doesn't my phone recognize my sd card?

[AC Question]

At&the Samsung galaxy mega 2 phone has latest firmware and the card is known to be good. This phone doesn't give me options to mount/dismount a sd card. Also doesn't give me options to send items to card. What am I missing. The card was last in a Samsung phone.

 

[demon 340]

Anything to do with the card to either mount/dismount or format is grayed out. I can put the same card in my other phone and do anything to it.