You can use an Online Text File Creator to paste your text, name the file, and download it directly as a .txt file.
If you are looking to create a plain text file containing that specific text (e.g., as a placeholder for a download link), you can do so using standard system tools or online generators. Datei herunterladen 79D0113F769AA063432025C2116...
Open Notepad, paste the text "Datei herunterladen 79D0113F769AA063432025C2116...", and go to File > Save As . Ensure you select "All Files" in the "Save as type" dropdown and name it with a .txt extension. You can use an Online Text File Creator