Depending on the operating system, we can download Testdisk from its website.
Once downloaded, we go to the terminal, access the folder and run:
./photorec_static (root required)
or in my case (when opening the program we will need root):
wget http://www.cgsecurity.org/testdisk-7.0-WIP.linux26-x86_64.tar.bz2
tar xvzf testdisk-7.0-WIP.linux26-x86_64.tar.bz2
cd testdisk-7.0-WIP.linux26-x86_64
./photorec_static
for more information, visit: http://www.cgsecurity.org/wiki/TestDisk_Paso_A_Paso