R21 File – What is .r21 file and how to open it?
R21 File Extension
WinRAR Split Archive Part 21 – file format by Eugene Roshal
File extension R21 is part of a multi-part compressed file archive created by WinRAR. It requires other numbered parts to extract the complete archive.
WinRAR Split Archive Part 21 (R21 File)
A file with the .R21 extension is a split RAR archive, which is a compressed file that has been divided into multiple smaller parts. This is typically done to make it easier to transfer or store the file, as it can be split into smaller chunks that are more manageable. The .R21 extension indicates that it is the 21st part of a split RAR archive.
Properties of R21 Files
R21 files are created using the WinRAR compression software. When a file is split into multiple parts, each part is compressed separately using the RAR compression algorithm. The resulting parts are then saved with the same base name, but with different extensions (e.g., .R01, .R02, .R03, etc.). The .R21 file contains the 21st part of the split RAR archive. To extract the entire archive, all parts must be present and combined using the WinRAR software.
Understanding R21 Files
R21 files are one part of a multi-part split archive created using the popular WinRAR compression utility. When a large file exceeds the maximum size limit for a single archive file, WinRAR automatically divides it into smaller parts, assigning each part a unique file extension based on its order in the sequence. R21 files are typically the 21st part of a split archive.
Opening R21 Files
To open an R21 file, you will need the WinRAR application or compatible software. WinRAR is widely available for various operating systems, including Windows, macOS, Linux, and Android. Once installed, follow these steps:
- Locate the R21 file and all other parts of the split archive. Ensure that they are all in the same folder.
- Open WinRAR and navigate to the folder containing the split archive parts.
- Select the first part of the archive (usually with the .rar extension) and click on the “Extract To” button.
- Choose the destination folder where you want to extract the contents.
- WinRAR will automatically detect and extract all parts of the split archive, including the R21 file, to the specified destination folder.
File Format and Usage
R21 files are a part of a split RAR archive, which is a compressed file that has been divided into smaller parts for easier storage and transfer. The .R21 extension specifically denotes the 21st part of the split archive. RAR stands for Roshal Archive and was developed by Eugene Roshal, a Russian software engineer. RAR uses a proprietary compression algorithm that is known for its high compression ratios and strong encryption capabilities. Split RAR archives allow for the convenient handling of large files that exceed the capacity of a single storage medium or file-transfer protocol.
Extraction and Compatibility
To extract the contents of an R21 file, the complete set of RAR parts must be available. This includes all the parts with the extensions .R00, .R01, .R02, and so on, up to the final part, which may be named .RAR or have a different extension. The extraction process can be initiated by using a compatible file archiver, such as WinRAR, 7-Zip, or PeaZip. Once all the parts are present, the archiver will automatically combine and extract the original compressed file. It is crucial to note that individual R21 parts are not usable on their own; the complete archive must be present for successful extraction.