my data on routerboard help in regaining

Welcome. Unfortunately I could not find a solution on the forum and I have to send inquiry. After reboot the routerboard does any interfaces not load the driver. I do not want to do netinsall because I have important data. I would add that by the console RS232 I have access to a working system. And now my question is how you can download or upload files through the console. Please help me. Regards Rafa