Notes about the POSD 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 POSD file type is primarily associated with 'Viva Posterize' by VIVA. The .posd file format is proprietary file format, but contains an xmp label at the end, so developers can easily read and extract complete pages as an image file. Other related proprietary Viva file extensions include .desd (Viva Designer), .nwpd (VivaNWP Designer), impd. (Viva Impose).
Detailed information for file extension POSD:
File classification: Desktop Publishing
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.