But how do the software mentioned below undelete deleted files?
There are many free software that allow users to do this. Some of them are given below:-
1) Pandora Recovery
2) TOKIWA DataRecovery
All of these recovery software support recovery from memory sticks, digital camera cards and MP3 players. They support undeleting all types of pictures, software, movies and documents from both FAT and NTFS formatted drives. They work on Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista and Windows XP.
1) When a file is deleted accidentally on a storage device, make sure that you don't do anything on it as doing that would increase the chances of new data being written over your deleted files; which would make file recovery impossible.
2) If you have deleted files on your main computer (the one you are using right now), do not browse the internet, download new software or shut it down. Keep it running and go to another computer, download one of the software mentioned above that is portable and save it on a flash drive. Then plugin the flash drive in your current system and perform file recovery. Regardless of whether you accidentally delete files a lot or not, make sure to always have that software in your flash drive in case you accidentally delete important files.
3) If one software fails to recover your deleted file, it does not mean that another one wouldn't recover it too.