: These files typically follow a sequence, such as .part01.rar , .part02.rar , etc.

: To access the contents, you must have all parts of the archive in the same folder. You generally only need to open the first part ( .part01.rar ) using a tool like WinRAR or 7-Zip , and the software will automatically join the subsequent parts, including part02 , to reconstruct the original data. Understanding the "LL-B64" Prefix

A multi-part (or multi-volume) RAR archive is a single large file split into smaller pieces to make storage and transmission easier.

The file is the second segment of a multi-part compressed archive. The naming convention suggests it is part of a larger dataset (likely "LL") that has been encoded or processed using Base64 . Overview of Multi-Part RAR Archives

While "LL-B64" is not a standard software extension, the components provide clues to its likely purpose: