Is It Possible to Convert Large OLM Files to PST? Large OLM files can be converted to PST when the selected conversion software supports large mailbox databases and sufficient system resources. Before starting, ensure that the computer has enough free storage for the source file, temporary processing, and resulting PST. Scanning and previewing the mailbox can help identify the folders and items that need conversion. For very large files, processing may take additional time depending on the amount of data and system performance. Users should avoid interrupting the conversion process and verify the generated PST after completion to ensure important emails, attachments, and folder structures are available.https://www.vartikasoftware.com/product/olm-to-pst-converter.html