Method 1Once you've realized you've done a mass file deletion on an SD Card, remove the card from the device and don't write any data to it. The way file deletion works in most file systems, including the FAT file system used on SD cards, is to delete the first two characters of the file name, but leave the rest of the data intact until those sectors need to be re-used by something else.
Some, but not all, devices have an undelete function – read through the manual for your device and see if the software included has this capability. If it does, use it to recover your data. This is particularly handy if you deleted your photos on Windows 8 or Mac OS X Mavericks, as those operating systems have built-in file recovery capabilities with the Recycle Bin and Trash.You still can not recover the deleted photos through these two methods? You can try CardRecovery. CardRecoveryPro is a simple memory card recovery software, which can effectively restore lost, deleted, corrupted or formatted photos, video files and other multimedia files from basically all of the memory card. It's absolutely safe to run CardRecoveryPro because it only performs the read-only operation on the memory card. The software doesn't move, delete, or modify the data on the card to avoid causing further damage or overwriting. It recovers the photos and movie clips from the source memory card and saves them to the destination location you specify.