Step 1: The welcome screen of the Import OST to Thunderbird tool
Step 2: Adding OST file for Thunderbird import
Step 3: Previewing OST data before importing to Thunderbird
Step 4: Choosing MBOX format for saving OST data
Step 5: Filtering MBOX data before Thunderbird import
Step 6: Importing MBOX file to Mozilla Thunderbird
Step 7: OST to Thunderbird import process in progress
Step 8: Successful completion of OST to Thunderbird import
