The file name ending in indicates this is a multi-part (split) archive .
Large audio mixes or video game assets frequently use this format for easier distribution. It_s_Time.part1.rar
Large files (like software installers, high-quality videos, or sound libraries) are often split into smaller "volumes" to make them easier to download or share. The file name ending in indicates this is
While the name is generic, files with this naming convention often contain: It_s_Time.part1.rar