Kernel for Windows Recovery is a useful tool that is capable of recovering data from all types of external storage devices including memory cards, MMC cards, XD cards, secure digital cards, SD and mini SD cards, memory stick and so on. This memory card recovery tool can fix problems like wrong Windows partitioning, virus attack, damaged or deleted partitions and Windows registry corruption errors to restore data.
As Larry Stuff writes, you need a data recovery tool to regain your photos back as long as you have not rewritten the original data.
Do not save new data on this SD card and connect it to a computer or laptop via a card Reader.
And then, download data recovery freeware to restore your photos back for free. There are plenty of free data recovery tools. You should cautiously select a right one.
Run the freeware several times so that you could restore the largest amount of your data.
At last, save your recovered data on a different card or drive in case of recovery failure. Important note: The rewritten data can be erased forever. You should remember not to put new file to rewrite the original data.
The recovered data should be saved on a different storage device in case of data loss.
You are supposed to make data backups as possible as you can in the future.