How to Convert Multiple SD0 Files to DGN?
1. Download and Install reaConverter
reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. reaConverter is incredibly powerful and boasts an extensive variety of features.
2. Load your SD0 files
Start reaConverter and load all the .sd0 files you intend to convert into .dgn. The software supports multiple SD0 conversion and processes all files locally on your computer.
Select SD0s from a folder or by drag-and-dropping them directly into the reaConverter window.

3. Select DGN as output format
Pick the DGN as output format and choose the destination folder where you want to save new .dgn files.

4. Start SD0 to DGN conversion
Then simply press Convert button and your conversion will begin in no time!

Once the conversion is complete, you can find your DGN files in the destination folder you selected.