Files with bis file extension are generally related to old and no longer developed utility called BelSync.
BIS file extension - BeInSync data
What is bis file? How to open bis files?
File type specification:
The bis file extension is associated with BeInSync utility, a marketing and synchronization program for Windows, published by Phoenix Technologies and originally developed by BeInSync company.
This program allowed users to store their e-mails, web favorites and other files on secured server and access them from everywhere.
When the program copies one of the files to server it adds BIS extension tothe standard file extension, so for example photo.jpg will be renamed to photo.jpg.bis. Probably just normal renaming without added file encryption, so deleting the BIS suffix should restore the original file.
In 2008 Phoenix Technologies acquired BeInSync and the program is no longer available and probably no longer supported as well,.
This bis 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.
