When using Odin, you typically load specific firmware files into these slots:
Samsung firmware files are massive (often 3GB to 6GB). Finding the correct version for your specific region (CSC) and model number can be difficult. GSMROM.net is a third-party repository that indexes these firmware files. gsmrom.net odin
If you'd like to move forward with a specific repair, please tell me: What is your (e.g., SM-G998B)? When using Odin, you typically load specific firmware