This happens because the free space is thereafter possessed by the white spaces. In case of UNICODE, the limit can go up to 50 GB and it appears that OST file is too large, whereas ANSI files can grow up to 2 GB.Īnd if any of the data gets deleted, the size will not reduce much in proportion to the deleted volume. Here, we are talking about offline Outlook Data file (OST) that increases in volume as more and more data is added to the mailbox. As you create mailbox data and receive items frequently, your Outlook mailbox keeps on growing enormously.
