This is for advanced users only. If your phone is not rooted, skip to Method 2.
Because this app isn’t on Play Store, be careful. Here’s how to download it without risking malware:
USBUtilV2. 0FullEnglish_201607 directory listing. Internet Archive Audio. Live Music Archive Librivox Free Audio. Internet Archive Releases · IsseiYoshida/OPLUtil - GitHub