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Are all emails, todos, calander items held in one file for Microsoft Outlook (I.e the OST and PST file)? If so why do they use the one file?

Any idea?

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migrated from Oct 1 '09 at 6:51

This question came from our site for professional and enthusiast programmers.

As James noted, they're all in one file by default. I expect the reason is based on a number of factors, least of all that it's easier to back up one file, it locks you in to Outlook, and it has features including compressible encryption.

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Outlook indexes all items for searchability, I guess it's much easier to index a database than a file structure. Plus all the reasons mentioned by others.

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As long as you don't set it up to split it, yes they are all in said file.

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This is really a comment, not an answer to the question. Please use "add comment" to leave feedback for the author. – Diogo Aug 9 '12 at 0:59

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