The BI$ file extension is related to the compression file format developed by Microsoft.

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BI$ file extension - Microsoft compressed file

What is bi$ file? How to open bi$ files?

File type specification:

Archive and compressed file type icon Archive and compressed file type

The BI$ file extension is associated with some kind of applications, or operating systems developed by Microsoft. The *.bi$ file stores compressed data.

The BI$ compression format seems to be obsolete, without support from Microsoft.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .bi$ file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

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