Question: how to backup outlook files to flash drive?
Answer: Open Outlook.
Click “File”, “Import and Export…”
Select “Export to a file” and click “Next >”
Select “Personal Folder File (. ... 
Select the folder or folders that you want to back up.
to back up all of your outlook data, you can click “Mailbox – *your name*” and check “Include subfolders”
click “Next >”