Arduino DUE copy program 1:1

I have a working Arduino DUE model R3 (Atmel ATSAM3X8E) with a program inside. Since I do not have the program I need to make a backup in case of failure in the second replacement Arduino DUE model R3 (Atmel ATSAM3X8E).
How can I do this? Can a program in Arduino DUE be somehow locked against copy or read? Can't I damage the existing one in this way?

Please, give me an advice. Thank you.

Hi @karel74
Is it the same subject?

RV mineirin

See reply #4 of this topic:

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