How to open Sage backup .999 files
Have you had trouble opening the 999 file on your computer? What are 999 files? We explain what they are and recommend software that we know will open them.
What is 999 file?
Files with 999 file extension are used by Sega games to make backup.
Sage backup description
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.
Suggested software to open 999 file
A business management software