How to open Split Multi-volume ARJ compressed file archive (part 3) .a01 files
Have you had trouble opening the a01 file on your computer? What are a01 files? We explain what they are and recommend software that we know will open them.
What is a01 file?
An a01 file extension is related to ARJ archiving utility for MS-DOS and Microsoft Windows operating systems. An a01 file stores one part of a multi-volume ARJ archive.
Split Multi-volume ARJ compressed file archive (part 3) description
The a01 file extension is associated with ARJ, once very popular archiving program for MS-DOS.
The a01 file is one part of a multi-volume compressed ARJ archive. The arj file extension is used for the native format of ARJ archiver.
ARJ is a file archiver that compresses files into a disk space saving archive. It is fast, reliable, and has a rich set of features which include Windows 9x, Millenium long filename support, file version management, data damage protection, ANSI escape sequence display handler, configurable command options, multiple volume archives (archives that span diskettes) and much more.
Some arj files can be parts of a multi-volume sequences. In ARJ you can split a huge archive to a few smaller files, which are called volumes.
ARJ archiver does use the following sequence:
- .arj for first volume
- .a00, a01, a02 .... etc. for any additional volumes
In order to unpack the multi-volume arj archive, you need to place ALL of the split parts in the same directory and start extraction of the first volume (.arj). The program will automatically use all of the parts to extract the content of the archive.
Suggested software to open a01 file

ARJ32
A command line version of ARJ archiver