Since "BH.rar" suggests an archive, below is a text detailing the history, mechanics, and utilities related to these compression formats. The RAR Archive Format
The format is an older compression standard typically associated with the BlakHole archiving utility. While less common today, it is still supported by several versatile file managers: BH.rar
If you have a file named BH.rar , it is likely a RAR-compressed archive containing files related to the BH format or simply a file that has been double-compressed. To manage such files, you can use: Since "BH