Apps like Spotify, Amazon Music, or YouTube Music allow downloading for offline listening. To give you the best guide, I need to know:

Several platforms allow for legitimate, free downloads of MP3 files, which can be easily transferred to players:

A digital library that includes a large, legal music archive.

A platform focusing on artist-driven music, featuring a large repository of downloadable tracks.

Ensure the files are .mp3 for maximum compatibility with portable players.

Connect your MP3 player to your computer using its USB cable.

Drag and drop the downloaded .mp3 files from your computer into the music folder of the player.

The player should appear as a "Removable Disk" or "External Drive" in your file explorer (Windows) or Finder (Mac). Transfer Files: Open the MP3 player drive.