Increased Zip File Capacity

In addition to supporting the original Zip file format, WinZip^® 9.0 and later also supports the 64-bit extensions to the Zip file format. The extended format lets you store all the data you need in Zip files of virtually unlimited size.

The original Zip file format limited the number of member files in a Zip file to 65,535, and the maximum size of both the Zip file itself and any member file to 4 gigabytes. For all practical purposes, the 64-bit extended format eliminates all these restrictions. Using the extended format, the member file size, Zip file size, and number of member files you can add to a Zip file are limited only by your system's resources.

WinZip remains fully compatible with the original file format and uses the original format whenever possible. WinZip uses the 64-bit extended format only when the limits of the original format are exceeded.

Note:
Zip files that are created using the 64-bit Zip file extensions require a Zip utility, such as WinZip, that supports this format in order to open these Zip files.

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