Why is my memory card not showing in file manager

[AC Question]

I have a intex Android​ phone .
I have always connected my memory card through external USB storage .
But it was somehow has a lose connection.
Suddenly once while connecting it it , memory card does not showed, Not as external USB storage nor as internal SD storage.
After connection for many time it shows message "damaged​ external storage. format it."
But it doesn't format even when clicking the notification.
Please help me what to do?
How to fix my memory card and recover my files on it?
It was a 8 GB memory card.

 

[YouBlue_dev]

You can try reading the card on a PC, but it sounds like your SD card is damaged. What brand/class was it? If the files are very important, there are services which can help you extract them, but it's not cheap.