![](https://cdn.iplocation.net/assets/images/blog/2024/featured/ost-to-outlook.png)
For Outlook users, both OST and PST files are essential for saving mailbox data. OST files are particularly useful as they store Exchange data and allow access to it in offline mode. However, a limitation of OST files is that they are not portable, meaning users cannot import them directly into another Outlook account. To import an OST file into Outlook, users must first convert it into a PST file.