Avoid shady “MP3 downloader” websites and torrents. They may offer exactly what you search for—free albums in ZIP format—but at the risk of legal trouble or infecting your device.

Technically, you don't "install" music—you it. Here is how to handle your "musica gratis" ZIP files on any device: On Windows/PC: Right-click the downloaded ZIP file. Select "Extract All..."

Always scan any downloaded ZIP file with or Windows Defender before extracting.