Sorry, I can only write in English, I used google Translate to read your question.
in the picture you have up, hit the middle button at the bottom and that will allow you to save as a pc3 file.
alternatively when you click ok after making changes, in the box that appears, you can tell it to save changes to a file, the current file name should be the one that is in the box by default.
Christopher T. Cowgill, P.E.
AutoCAD Certified Professional
Civil 3D Certified Professional
Civil 3D 2022 on Windows 10
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