Réponse à : « Camera gets Err 30 message. How do I fix it? »I bought a EOS50D in 2009 and recently, maybe about 6 months, she started with this error 30. When this error appears I turn off and turn on the machine and it solves the problem. As I have already taken more than 50,000 photos with this Canon, I believe that this problem is acceptable and even expected.