Type the following command and press : cat *.txt > combined_files.txt

Result: The cat (concatenate) command merges the contents sequentially into the new file. 🛠️ Important Tips

Navigate to your folder using cd (e.g., cd Desktop/my_folder ).

If your files don't end with a "new line" character, the last line of one file and the first line of the next might stick together.

Type the following command and press : type *.txt > combined_files.txt

Error in opening existing file in SdFat library? - Arduino Forum