Download and launch the DRS PST Compress tool on your Windows machine.
Choose the Single File or Multiple Files/Folder options and click the Next button.
On another wizard, the software shows you four different options:
Here, we click the Select File option to add the Outlook data file(.pst).
Select the files from your computer and click the Open button.
Once you select the PST files you need to compact, click Next.
Select the folders and subfolders in the opening tree structure you want to compress.
You can also check the PST folders and file detail s by double-clicking on the specific one. Click Next.
Choose the Compression Options according to your need.
Here, we proceed with the working steps by selecting the Compress All Attachments in the New PST file.
Go to Some Extra Feature Section:
Now, click the Path To Save button to choose the location for the output folder.
Click the Start Compression button to begin the PST compression process.
The PST compression procedure is running. Make sure not to interrupt till the process gets completed.
After the process is finished, you can download the status report for future reference. On the other hand, you can also start the PST file compression process once more by clicking on the Convert Again button.
Finally, close and exit the software.