Compressing files in modern operating systems is usually pretty simple, but things can get more how to compress already compressed pdf files when the files are large. If the files are too big, you won’t be able to use your operating system’s built-in compression software. Luckily there are programs available that can compress files of any size, and with the right settings can potentially reduce the file size by quite a bit.
If you’re trying to get your media file sizes under control, there are a variety of formats for images, videos, and audio that allow you to compress them without suffering too much quality loss. Understand that not all files can be compressed by a significant amount. Compression works by replacing sets of characters within a file with smaller, placeholder characters, resulting in a smaller file size.
Not all files lend themselves well to compression, and you may not be able to compress a file much smaller than its original size. This guide is for compressing files too large for standard compression software, as well as compressing media files. If you want to learn how to compress multiple files into a single compressed archive using your operating system’s software, click here.
Download an alternative compression program for files larger than 4 GB. The built-in compression software on most operating systems will cap out at 4 GB of data in a single ZIP file.
If you need to compress a file that’s larger than that, you’ll need to download and install a third-party compression program. Keep in mind that if you’re sharing your compressed files, the recipient will need a program that can open the type of file you create. 7-Zip is one of the most popular open-source options for Windows.
You can download it for free from 7-zip. WinRAR is a powerful paid program for Windows and Mac that can perform very efficient compression. Archiver is one of the most popular Mac compression programs that allows you to create archives in 7-Zip and RAR format, as well as its own proprietary format. With their default settings, 7-Zip and WinRAR will typically compress more efficiently than your operating system’s built-in compression software.
You can increase the compression even more by adjusting some settings. In the “Add to Archive” menu, you can set your compression options. Note that increasing compression levels can significantly increase the time it takes to compress.
For maximum compression, set “Compression level” to “Ultra”. Set the “Dictionary size” to a value ten times lower than your available memory. A larger dictionary means better compression, but the memory requirements are ten times the dictionary size.
Set “Solid Block size” to “Solid” for the best compression. WinRAR – Right-click on the file or folder you want to compress and select “Add to archive” with the WinRAR logo. Note that increasing compression levels can significantly increase the time it takes to compress.
Best” from the “Compression method” drop-down menu. Ensure “Dictionary size” is set to “5096 KB”.
Check the “Create solid archive” box. Set “Text compression” to “Auto”.