Here’s a in English on how to password-protect a folder on different operating systems, since your phrase is in Spanish ("como proteger una carpeta con contraseña"). The Short Answer First There is no built-in one-click "password protect folder" feature in Windows or macOS (unlike Android or some Linux distributions). You have to use workarounds: encryption, compressed archives with passwords, or third-party software.
Below are the most effective methods. Pros: No extra software, transparent to you after setup. Cons: Only works on Windows Pro/Enterprise (not Home), password = your Windows account password. If you reset your Windows password without a backup key, data is lost. como proteger una carpeta con contraseña