The .r05 file extension is most commonly associated with split file archives. When a compression and archiving utility, such as WinRAR, is used to compress a batch of files into a single file archive, the resulting archive can be split into smaller volumes. This makes it easier to share the files over the Web and to save the archive across multiple computer disks. Each volume of the split archive is given its own extension in sequence, such as .r01, .r02, .r03, etc. The .r05 file extension is normally given to the fifth volume of the split file archive.
The .r05 file extension is also used for Norton Ghost files.
Try a universal file viewer
File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.
If you have additional information about the R05 file format or software that uses files with the R05 suffix, please do get in touch - we would love hearing from you.