I am currently using Sony Xperia L. After I transfer mp3 files from internal storage to sd card using the option from settings the files become corrupted and can not be played. What will be the problem and how can I solve it.
Sounds like your card may be defective. I had a similar problem a few weeks ago. Try testing it with h2test2 ( http://www.softpedia.com/get/System/System-Miscellaneous/H2testw.shtml). Note that you will have to format the card first (quick format is fine), and it may take an hour or two.