The file ELO_MP3.part13.rar appears to be a specific volume of a split compressed archive containing the discography or a large collection of their MP3 files.
: Because the collection is massive, it is often split into multiple parts (e.g., .part01.rar through .part13.rar or more) to stay within file size limits of hosting services. Important Notes for Users ELO_MP3.part13.rar
: The full ELO discography includes 15 studio albums and dozens of hit singles like "Mr. Blue Sky," "Evil Woman," and "Telephone Line". The file ELO_MP3