File Extension SD4

  • Full name
    Smart Diary Suite Database
  • Developer
    Programming Sunrise
Have you encountered a problem with a SD4 file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a SD4 file here. In the further part of this page we have added a list of programs that should open your SD4 file. It is enough you choose a proper application for your operating system, download and install it.


The SD4 file extension is used by the Personal Information Manager (PIM) Smart Diary Suite software for the main database file. It is a kind of diary software, which can be used as an organizer, diary or health diary.

All entries are saved in the SD4 file. Note that the extension SD4 is the version 4 database file. Version 3 used the extension sdi, version 2 isd. Both file types can be imported from version 4 via 'Tools-> Import'.

Programs which can open a SD4 file

How to open a SD4 file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the SD4 file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a SD4 file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support SD4 files. At this point we are looking for disk space where the application was installed in and we can link it with a SD4 file. Since then, our operating system will use the selected program to support all SD4 files.

Other issues

Despite the described problem with SD4 there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the SD4 file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the SD4 file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

Similar extensions