SUM File Extension

What is SUM file?

Full format name of files that use SUM extension is Garmin Checksum Format. Garmin Checksum Format specification was created by Garmin. SUM files are supported by software applications available for devices running Windows. Files with SUM extension are categorized as Misc Files files. The Misc Files subset comprises 6033 various file formats. Garmin Connect supports SUM files and is the most frequently used program to handle such files, yet 1 other tools may also be used. Software named Garmin Connect was created by Garmin Ltd.. In order to find more detailed information on the software and SUM files, check the developer’s official website.

Programs which support SUM file extension

The following listing features SUM-compatible programs. Files with SUM extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

How to open file with SUM extension?

There can be multiple causes why you have problems with opening SUM files on given system. What is important, all common issues related to files with SUM extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The list below will guide you through the process of addressing the encountered problem.

Step 1. Get the Garmin Connect

The main and most frequent cause precluding users form opening SUM files is that no program that can handle SUM files is installed on user’s system. The most obvious solution is to download and install Garmin Connect or one to the listed programs: eSignal. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. The safest method of downloading Garmin Connect installed is by going to developer’s website (Garmin Ltd.) and downloading the software using provided links.

Step 2. Verify the you have the latest version of Garmin Connect

You still cannot access SUM files although Garmin Connect is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. This can be one of the causes why SUM files are not compatible with Garmin Connect. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Garmin Connect.

Step 3. Set the default application to open SUM files to Garmin Connect

After installing Garmin Connect (the most recent version) make sure that it is set as the default application to open SUM files. The method is quite simple and varies little across operating systems.

Change the default application in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the SUM file
• Next, select the Choose another app option and then using More apps open the list of available applications
• Finally select Look for another app on this PC, point to the folder where Garmin Connect is installed, check the Always use this app to open SUM files box and conform your selection by clicking OK button

Change the default application in Mac OS

• From the drop-down menu, accessed by clicking the file with SUM extension, select Information
• Open the Open with section by clicking its name
• From the list choose the appropriate program and confirm by clicking Change for all....
• Finally, a This change will be applied to all files with SUM extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Ensure that the SUM file is complete and free of errors

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the SUM file in question. It is probable that the file is corrupted and thus cannot be accessed.

1. Check the SUM file for viruses or malware

If the SUM is indeed infected, it is possible that the malware is blocking it from opening. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. SUM file is infected with malware? Follow the steps suggested by your antivirus software.

2. Ensure the file with SUM extension is complete and error-free

If the SUM file was sent to you by someone else, ask this person to resend the file to you. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. It could happen the the download process of file with SUM extension was interrupted and the file data is defective. Download the file again from the same source.

3. Ensure that you have appropriate access rights

Sometimes in order to access files user need to have administrative privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the Garmin Checksum Format file.

4. Check whether your system can handle Garmin Connect

If the system is under havy load, it may not be able to handle the program that you use to open files with SUM extension. In this case close the other applications.

5. Verify that your operating system and drivers are up to date

Latest versions of programs and drivers may help you solve problems with Garmin Checksum Format files and ensure security of your device and operating system. It may be the case that the SUM files work properly with updated software that addresses some system bugs.

Do you want to help?

If you have additional information about the SUM file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on SUM file.