File Extension Database

Open STG File

A file with the STG extension is a backup created by ActiveSync, a program used to synchronize PCs with mobile devices.

ActiveSync, from concept

ActiveSync is an application and protocol developed by Microsoft and used to synchronize data between mobile devices and desktop computers based on Windows systems.

Some Groupware type servers are compatible with ActiveSync and can be used to exchange information on mobile devices.

ActiveSync provides a way for Microsoft Windows users to move documents, emails, tasks, contact lists, calendars, bookmarks, and files between the PC and any mobile device.

It also supports manual file transfer to mobile devices, along with limited backup functions and the ability to install or uninstall mobile apps from the mobile device.

Some devices are supported, such as PDAs and smartphones running Windows Mobile, Windows CE or BlackBerry 10 as the operating system.

However, ActiveSync does not support iPhone, older versions of BlackBerry, Palm OS, or Symbian.

Starting with Windows Vista, the ActiveSync application was replaced by Windows Mobile Device Center, but the underlying protocol is still called ActiveSync.

It is also important to note that Windows Phone 7 does not support ActiveSync synchronization.

Relationship between an STG file and ActiveSync

The STG file contains a backup of all files on the mobile device, including contacts, notes, and calendar data.

This turns the STG file into a container, and it usually appears with the filename backup.stg.

As relevant information, Microsoft removed the backup and restore function starting with version 4.2 of ActiveSync.

To recover backed up files with ActiveSync, use version 4 or earlier that supports STG files.

STG files, being Backup files, are a proprietary format that should not attempt to be manually opened by the user.

Software packages compatible with an STG file

Microsoft ActiveSync

How Can I Open STG File on Windows

We researched and learned that the best way to open STG file is to find a STG file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a STG file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open STG file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as STG file opener then try to search online for "STG viewer", "application to open STG file" or "open STG file" queries in the search engine you like.
Install the application you found and check if it can open STG file

How Can I Open STG File on Mac OS

We recommend to find a STG file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a STG file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with STG file.
If you know the Mac OS application which can work as STG file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open STG file in it.
If you don't know the application which can open STG file then try to search for "STG viewer", "application to open STG file" or "read STG file" queries in the online search engine you like.
Install the application you found and check if it can read STG file

How Can I Open STG File on Android

If you downloaded a STG file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded STG file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "STG".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "STG viewer", "STG file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open STG File on iPhone or iPad

To open STG File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the STG file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "STG". This way you can find apps which can open STG files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "STG viewer" or "STG file" online in your favorite search engine.

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