A medialib-bak file extension is related to the Media Manager software.
MEDIALIB file extension - Media Manager data
What is medialib file? How to open medialib files?
File type specification:
The medialib file extension is associated with the Media Manager, a software for Microsoft Windwos operating system.
The medialib file stores some kind of data used by Media Manager.
MIME types:
mediamgr/medialib
This medialib 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.