A reliable way to convert PST files to different file formats is by using a tool like MacSonik PST Converter. It can also migrate PST Outlook emails to Gmail, iCloud, IMAP, AOL, Amazon WorkMail, and many more. The software has multiple features like Naming Convention Option, in which you can save the file by subject name, received date of the email, and many more options. Furthermore, it has an Option to rename the Resultant File/Folder, by which the user can give the desired name or a custom name of the resultant file or folder.