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Archive file. An archive file is a file that is composed of one or more computer files along with metadata. Archive files are used to collect multiple data files together into a single file for easier portability and storage, or simply to compress files to use less storage space. Archive files often store directory structures, error detection and correction information, arbitrary comments, and sometimes use built-in encryption.
Access archived items. To review items in your archive, do one of the following: If the archive Outlook Data File (.pst) is open in Outlook In the Navigation Pane, in the Folder List, click Archives (or the name you specified for the archive file).If the archive Outlook Data File (.pst) is not open in Outlook, Click the File tab. Click Open.Click Open Outlook Data File, and then browse to open the archive Outlook Data File (.pst). In the Navigation Pane, in the Folder List, click Archives (or the name you specified for the archive file).Top of Page.lick Open Outlook Data File, and then browse to open the archive Outlook Data File (.pst). In the Navigation Pane, in the Folder List, click Archives (or the name you specified for the archive file). Top of Page.