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A PST file is a comprehensive backup of all your data stored in Outlook. If you want to switch from Outlook to Gmail, importing a PST file is the best way to transfer the most data with minimal work.

Ultimately, though, I settled on the Microsoft Outlook app for Android. I have since uninstalled all other email apps on my Google Pixel 9 Pro and gone all-in on Outlook — and I couldn’t be happier ...