Hi everyone I know some of us experincing problem with SD card and lost the data you saved on SD card. I also had bad experience with memory card and I hope this short article would give you a hint of what you should do when experiencing data lost. The data can be lost to virus, physical damaged, fake sd card, or any mysterious things only God know.
First of all do not format your memory card! If you format the memory card the chance to get back your data would be much harder. Second, try Googling a lil' bit with "data recovery" keywords and you'll find many software offering you the best way to recover your data. Some are free some are paid software. If your city have a computer center you might want to try to find it there too. If you bought some trusted brand memory card find a recovery software offered to you on the package.
The recovery software might help you recover your lost data but in my experience it's not always 100% success. It can depend on how good the software and how big your memory card storage, and how bad the damage on your memory card. And please keep in mind that your data might contain sensitive data.
Full read here and here
Recovery software example here and here: