How To recover files in dead or corrupt SD card for free

Expandable storage such as SD cards are great but they're fragile and don't like being mistreated.
Here's what to do if your trusty SD card has stopped working. Don't format the disk if you want to retain any of the photos on it.
The software that can recover corrupted SD card is ZAR (Zero Assumption Recovery).
Install ZAR, then insert the damaged SD card into your PC's card reader. Launch ZAR. (You may have to disable your PC's security software, in which case we recommend you also disable the internet connection).
When prompted, click the Image Recovery (Free) option. This will help you to recover photos from an SD card.
ZAR will now look for devices that are installed, and you need to point it toward the offending SD card. Select the correct disk and click Next. ZAR will now analyse your SD card. This will take a few minutes.
Once this is complete you'll see a list of the recovered files. On most SD cards the chances are that clicking the 'Root' checkbox will select all the images. Click Next and you can then select the folder into which recovered files will be placed. By default this will be the same as the folder your chose to save (so 'Root', in all likelihood).Goodluck