The Microsoft Outlook Express Store Folder is a special mail database folder, often marked as a hidden folder that contains all your email in the form of DBX files. DBX files are assembled with gibberish characters that are unreadable and suffixed with the *.dbx file extension.
To locate the Store Folder, follow these steps:
Open Microsoft Outlook Express
Click Options on the Tools Menu
Click the Maintenance tab
Click the Store Folder button
Highlight the Store Folder path
Press CTRL + C to copy the path onto the clipboard
Click OK twice to close the Options panel
Open Windows Explorer
Paste the path onto the Windows explorer address bar