
When you are using Outlook with an Exchange account, your mailbox and other data reside on the Exchange Server. The location of offline Outlook Data File (OST) But if you think you can save some storage space by relocating the OST file, you can do it. However, it’s not recommended and not required to change the default location of the OST file. If you find any issue with OST files like corruption, inaccessibility, or damages, you can simply delete or move the OST file and let Outlook rebuild the same without errors. OST files are profile-specific and cannot be accessed without the original profile. When you configure a new Exchange/IMAP profile in Outlook, an OST file is created in this default location. Depending on the version of Outlook and Windows, these files are saved in a pre-defined location. You can use Files On-Demand to free up space or to make sure files or folders are always available on your device, even when you're offline.Offline Outlook Data File (OST) in Outlook facilitates offline working with Exchange and IMAP accounts. The OneDrive app built in to Windows 10 synchronizes your files between OneDrive and your computer, so they're backed up, protected, and available on any device. Whether you save by default to your computer or to OneDrive, all your files are available on your PC.

You can change this default save location any time. If you clicked the “Only save files to this PC” option, you set up your PC as the default save location.

(Before July 2019, the screen said, "Protect your files with OneDrive.") If you clicked Next, you set up OneDrive as your default save location. While you can always choose where to save files that you create, your computer settings include default save locations for your Desktop, Documents, and Pictures files.ĭuring Windows 10 setup, you should have seen a “Back up your files with OneDrive” screen telling you about the benefits of saving your files to OneDrive.
