Notes about the BUP file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The BUP file type is primarily associated with 'DVD Info File Backup'. BUP files are just backup files of the IFO files. If the DVD player cannot read information from the VIDEO_TS.IFO, it will attempt to get the required information from this backup file. This file is required to be present on a DVD-compliant disc.
Detailed information for file extension BUP:
Primary association: DVD Info File Backup
Mime type: content/DVD
Other applications associated with file type BUP:
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.