An mbu file extension is related to the Sony CAV-M1000ES multi zone receiver. An mbu file stores memory backup.
MBU file extension - Sony CAV-M1000ES memory backup
What is mbu file? How to open mbu files?
File type specification:
The mbu file extension is associated with the Sony CAV-M1000ES.
The mbu files contain the entire memory of the CAV-M1000ES, including MSS, MSE and MCE files and individual RMRK100 keypad settings.
This mbu 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.