Corrupted Micro SD card or file system - Repair process

Hey there!

Two days ago I stopped receiving recordings from the security camera to Samba Share on the Rock 5b running radxa debian .
I think this was the event when something collapsed on the file system. Today I tried to login via ssh and every time I tried to log in the password was accepted but at the same time the connection was lost. Same was with the direct physical login (monitor + keyboard plugged into Rock).
There was a lot of errors and warning messages every time tapped return button. Also ctrl+alt+del only created some error messages.

I shut the power down and now I cannot ever boot the system.

So the question is… Is there any way to repair the image? Or is it the SD card which is faulty? How can I start searching for the solution?

Thank you!

Use an SD card reader and check the filesystem using a PC. In gparted for example.