To resolve this issue create a BACK UP of all your datas from your SD Card. Copy all the Itmes and paste it your Desktop. and try Quick formatting your SD Card. And hence forth check transferring the data back to your SD Card. I wish it works.
Step to Format SD Card:
1.) Go to "My Computer"
2.) Right click on the SD Card Icon, and click "Format..." in the Drop down menu.
3.) Check "Quick Format" and click "Start"
Now, SD Card starts formating
4.) Click "OK"
Thats all :)
Thank you :)