In one sentence, describe what the following article is about:

This box is located in the upper right-hand corner of the page.      A terminal window will open up with the PhotoRec 7.0 program. If prompted, grant permission to run the program. Since your mouse will not work in terminal, you must use your keyboard’s up and down arrow keys. You may be presented with multiple options on this screen. Note the size of each drive listed and choose the drive that is the same size as your SD card. Mac users choose “P Fat16 >32”. Windows users pick “P Fat32”. This will allow the program to scan the camera’s established directory system.  Only choose “Whole” if you believe your SD card is corrupted. You may create a folder at this time for the recovered files. Do not save the files to the SD card. The recovery process will start automatically.

Summary:
Navigate to the PhotoRec Wiki or click | here. Locate the “Latest Stable Version” box and click “7.0”. Scroll down to “TestDisk & PhotoRec 7.0” and click on the version compatible with your computer. Download the zip file to your desktop. Double click on the file to unzip it. Insert your SD card into your computer. Click on the “testdisk7.0” file to open it. Double-click on the “Photorec” file to open the program. Select your SD Card, or drive, and press ↵ Enter. Select the partition type and press ↵ Enter. Select the filesystem type “[Other]” and then press ↵ Enter. Select “Free” to search for files in Fat16 or Fat32. Use the arrow keys to choose a location to store the recovered files. Press C once the location is correct. Wait for the recovery process to finish. Navigate to the location you selected in step 13 to view your recovered files.