Are you able to copy files from the card? If you can, then just copy the card using PC or from the phone to a folder. Then try to format the card on the phone and copy your data back to the card
I recently started having issues with my micro sd card. I can't add, delete, move or modify any files. Short of formatting, any other way of resolving this problem?
There are a lot of things that can be done, but the easiest and safest would be to buy a new card from Samsung, remove the old card ( tell the device to eject the card in settings / storage first ) and put the new one in.