I would like to backup the entire content of my Raspberry Pi SD Card on linux PC. I have found online many tutorials that suggest to use
dd to perform the operation. However my SD Cards have a wide free space that doesn't require to be saved on backup, that is why I am searching for an efficient alternative to
dd that would not backup free space.
Do you have any idea of such alternative software that could do this ?
Thank you in advance.
Edit : When I say I want to perform a backup, I mean I want to make a copy of the entire OS installed in the SD Card plus personnal data installed on. When I restore the backup on another SD Card, I should get a clone of the initial SD Card. Furthermore, the backup should be done with the Raspberry shutdown and the SD Card plugged in my PC.