Evidently English is not your native language. How about answering my question about where you’ve been saving the file in your native language and I’ll use Google Translate to figure out what you are trying to say.
Again, where have you been saving the SketchUp file while you’ve been working on it?
It does look like maybe you have an older version of the model file so maybe you won’t have to start over completely.
I mean are you saving the file on an internal drive (inside your computer) or to an external (USB) drive or to a cloud location like Google Drive, OneDrive, or DropBox?
I told you. There’s nothing in the .skp but zeros and the.skb file is about half filled with zeros. You can’t make something out of nothing. You said you have a previous version of the model. Best thing is to open it and get to work redoing the modifications you made before.