In brief, a batch file is a finish package that contains a lot of command lines. However, when it comes to CMD, or Command Prompt, many people would show knowing smiles and nodding heads, or at least heard that its functions for fixing SD card not detected or format not complete successfully issues. What is a batch file? The name of batch file is not known to most people, even for long-time Windows users. How to Create a Batch File to Run Command in Windows