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Step 1: Double-Click the File
Before you try any other ways to open DD files, start by double-clicking the file icon. The file should open automatically. If it doesn’t open, or you see an error message, move on to Step 2.
Step 2: Choose the Right Program
There are many different programs you can use to open DD files. If the file doesn’t open when you double-click it, you may not have one of these programs on your computer. Try installing the most common programs associated with DD files, like Fuel and Petrol Tanks Project Data File (Procedimientos-Uno SL), C64 Image Doodle, or C64 Doodle. If none of these programs work, move to Step 3.
Step 3: Figure Out the File Type
The file type can give you a clue as to which programs can open your DD file. Files with the DD extension are usually Compressed Files. If you’re not sure what the file type is, follow the steps below to find it:
Using Windows:
- Right-click the file’s icon
- Click “Properties”
- Find the file type listed under “Type of File”
Using a Mac:
- Right-click the file’s icon
- Click “More Info”
- Find the file type listed under “Kind”
Once you know the file type, you can use this information do some searching for other possible programs that utilize file extension DD or that open Compressed Files. If this still doesn't help, move to Step 4.
Step 4: Check with the Software Developer
The most common programs associated with DD files are all created by different software developers. These developers can help you if you’re having trouble opening your DD file. Find your program in the left column of the table below and contact the developer listed in the right column.
| Software | Developer |
|---|---|
| Fuel and Petrol Tanks Project Data File (Procedimientos-Uno SL) | DDwin. Depósitos de combustibles y derivados del petróleo |
| C64 Image Doodle | PC Software Company |
| C64 Doodle | Unknown |
| Everest Data Dictionary | Everest Software Inc. |
| Macintosh Compressed Disk Doubler Archive | PC Software Company |
Step 5: Download a Universal File Viewer
If you have completed Steps 1 through 4 and you still can’t open your DD file, it’s time to try a universal file viewer like File Magic (Download). A universal file viewer is a program you can use to open hundreds of different types of files (depending on the format). Note: If your DD file isn’t compatible with a universal file viewer, it will open in binary format.
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1File types that are unsupported can be opened in binary format.
