What’s the Difference Between Outlook’s PST and OST Files?
https://www.howtogeek.com/690076/whats-the-difference-between-outlooks-pst-and-ost-files/
WebOct 6, 2020 · Microsoft Outlook stores your emails, tasks, and appointments as either PST or OST files. These both do the same basic job. However, there are some differences that are important, depending on whether you want to backup, restore, or move your data. To explain the difference between PST and OST files, we have to explain a bit of …
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