.R04 File Extension
File TypeWinRAR Split Archive Part 4
What is an R04 file?
An R04 file is a split archive created by WinRAR (Windows) or RAR (macOS or Unix). It contains one or more files split into several parts. R04 files are the fourth part of a split compressed archive (see .R01, .R02, and .R03).
Split archives created by WinRAR (Windows) or RAR (macOS or Unix) are named with ".Rxx" file extensions and may be numbered from R00 to R99.