.R03 File Extension
File TypeWinRAR Split Archive Part 3
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an R03 file?
Part three (see .R01 and .R02) of a compressed archive created with WinRAR (Windows) or RAR (Mac or Unix); split into several parts, allowing a single archive to be spanned across multiple discs; may be numbered from R00 to R99.