to compress large-capacity files, this is something that people often use in daily life, usually, we will compress the format called ZIP or RAR, in addition to , or a few formats, the following small series on everyone to understand the type of compression format. ZIP format ZIP format Solid compressed file is a compressed file stored in a special compression mode. It treats all the files in the compressed file as a continuous data stream. Solid compressed files only support compressed files in 7Z format. ZIP compressed files are always non-solid. A well-compressed compressed file can be determined by the user to choose a solid or non-solid compression method. Solid compression increases the compression ratio, especially when adding large numbers of small files, but it also has some important disadvantages: slower updates to existing solid compressed files; decompression of individual files from solid compressed files When a file is used, the files before it must be analyzed first. This causes the file to be fetched from a solid compressed file to be slower than a normal compressed file. However, when decompressing all files from a solid compressed file, the decompression speed has no effect. If any of the files in the solid compressed file are corrupted, it is impossible to extract all the files from the scope of the damage. The solid compression method is applicable when the compressed file is rarely updated; when it is not necessary to extract a file or part of the file from the compressed file frequently; the compression efficiency is more important than the compression speed. Volumes and self-extracting files (SFX) can also be made into a solid format. The 7Z format 7Z format has the highest compression ratio in the world, especially in solid compression. Another important feature is support for volume-compressed files. They are more convenient and simpler than ZIP's "cross-disk" compressed files. 2345 does not support ZIP disk splitting. If you want to create a volume compressed file, use 7Z's volume compression instead. The 7Z format also has some important features that are lacking in other formats, such as AES-256 encryption, and the ability to change and configure compression algorithms. The maximum size of a single file for 7Z and ZIP compressed files is 4 GB. It should be noted that the old file system does not support files larger than 4 GB. You must use the NTFS disk format to work properly. RAR format RAR is a patent file format that is usually higher than ZIP compression but slower in compression/decompression. It has recovery records, adds redundant data for repair, and recovers corrupted archives when the archive itself is corrupted but there are enough recovery records. 2345 good pressure from the 2.7 version to add plug-ins to support the modification of the RAR format. The backup format commonly used in the TAR format Linux system is currently used for data backup. 2345 good pressure support to generate TAR format compressed files, and directly create compression formats tar.gz, tar.bz2 and tar.xz