WinRAR-one of the popular archivers. The fact that it supports the backup format RAR, no need to explain. In addition, the program can work with archives ZIP, CAB, ARJ, LZH, TAR, GZ, ACE 2.0, BZIP, JAR, UUE, GZIP, BZIP2 and 7-Zip, while it has many very useful features - encryption, support of continuous (solid) archives, in which the compression ratio can be 10 - 50% more than the usual methods of special compression algorithm compresses multimedia files, support of multivolume archives, and many drugim.WinRAR provides complete management of files in the archives, the restoration of damaged archives, encryption, creating self-extracting and multivolume archives, integrates into the context menu providing the user with sufficient ease to use in working with him and much more. Very easy to learn and has a convenient interface.