File Extension Library

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.999 File Extension

  • Developer by: The Sage Group plc
  • Category: Backup Files

What are .999 files and how to open them?

Can't open .999 file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .999 file.

What is a .999 file extension?

.999 file extension is created by The Sage Group plc. .999 has been classified as Backup Files.

.999 is Sage backup

The 999 file extension is or was used by some Sage applications for their backup files. This type of backup was used on the old Sega games and there is no more information about this file.


How to open:

Use Sage programs to work with *.999 files.

How to convert:

As far as we know, this .999 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

How to fix problems with .999 files

  1. You need to update the application that you normally use to open .999 files. Only the latest version of the software supports the current .999 file format
  2. You need to check the .999 file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)
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