An lg file extension is related to the Arhangel compressed file format. An lg file stores compressed archive.
LG file extension - Arhangel compressed archive
What is lg file? How to open lg files?
File type specification:
The lg file extension is related to Arhangel compressed format.
Based on LGHA (though not compatible), but has compression enhancements (multimedia, English texts, executables compression, etc.) and LFN support.
Compression results are close to the world's best in all categories and are best for uncompressed 24-bit RGB TIFF images among universal archivers.
Mime types:
application/x-arhangel-compressed
This lg file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.