DD File Extension

What is DD file?

DD is a graphics file format used for storing raster graphics. DD files are associated with Doodle! graphics suited developed for Commodore 64. DD format is not related in any way with DDO format used by Doodle program for Atari. DD format had two versions – compressed and uncompressed. Version that supported compression used the JJ extension, while uncompressed version used the DD extension.

Commodore 64

Commodore 64 (C64) has been a very popular computer until PCs and Windows system were introduced. It was affordable and offered a rich collection of games and programs, including a simple office suite and image editor. C64 external case design resembles closely a very old keyboard design with added physical device interfaces. While C64 could be plugged to a monitor to display video output, many users used TVs as display devices, especially for gaming.

Programs which support DD file extension

The following listing features DD-compatible programs. Files with DD suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Updated: 04/16/2023

How to open file with DD extension?

There can be multiple causes why you have problems with opening DD files on given system. Fortunately, most common problems with DD files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Install Norton DiskDoubler software

Problems with opening and working with DD files are most probably having to do with no proper software compatible with DD files being present on your machine. This one is an easy one. Select Norton DiskDoubler or one of the recommended programs (for example, SuperDoubler, DDExpand, The Unarchiver) and download it from appropriate source and install on your system. Above you will find a complete listing of programs that support DD files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Norton DiskDoubler website and download the installer.

Step 2. Update Norton DiskDoubler to the latest version

If the problems with opening DD files still occur even after installing Norton DiskDoubler, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Norton DiskDoubler is available. Software developers may implement support for more modern file formats in updated versions of their products. This can be one of the causes why DD files are not compatible with Norton DiskDoubler. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Norton DiskDoubler.

Step 3. Set the default application to open DD files to Norton DiskDoubler

If the issue has not been solved in the previous step, you should associate DD files with latest version of Norton DiskDoubler you have installed on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

The procedure to change the default program in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the DD 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 Norton DiskDoubler is installed, check the Always use this app to open DD files box and conform your selection by clicking OK button

The procedure to change the default program in Mac OS

• Right-click the DD file and select Information
• Open the Open with section by clicking its name
• Select Norton DiskDoubler and click Change for all...
• Finally, a This change will be applied to all files with DD extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Check the DD for errors

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the DD file in question. Being unable to access the file can be related to various issues.

1. Verify that the DD in question is not infected with a computer virus

Should it happed that the DD is infected with a virus, this may be that cause that prevents you from accessing it. Scan the DD file as well as your computer for malware or viruses. If the scanner detected that the DD file is unsafe, proceed as instructed by the antivirus program to neutralize the threat.

2. Check whether the file is corrupted or damaged

If you obtained the problematic DD file from a third party, ask them to supply you with another copy. 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 DD extension was interrupted and the file data is defective. Download the file again from the same source.

3. Verify whether your account has administrative rights

Sometimes in order to access files user need to have administrative privileges. Switch to an account that has required privileges and try opening the Doodle C64 Image Format file again.

4. Make sure that the system has sufficient resources to run Norton DiskDoubler

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

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with Doodle C64 Image Format files and ensure security of your device and operating system. It may be the case that the DD files work properly with updated software that addresses some system bugs.

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