My sd card doesn't work

[pratikgrg2002]

At first my sd card was working properly and suddenly it stopped working in Samsung Galaxy j2

 

[webworkings]

Was it removed at any time? Or was the phone dropped, etc.? Any of those could cause it.

If none of that, I would try using a different SD card in the device (and try yours in another device) to see if the problem is the card or the port.