.ONEPKG File Extension
File TypeMicrosoft OneNote Package File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an ONEPKG file?
Package file created by OneNote, a program that allows users to create and manage digital notes information; contains multiple OneNote files packaged into a single archive; used to publish notes to other users and to backup OneNote files.
ONEPKG files may be imported, or "unpacked", to a local folder by double-clicking the file and choosing the destination folder in OneNote.