Organize: how to back up files in Outlook Express

Apple: My outlook often archive backups and put the files locally into different small backup files, which is convenient for examination. However, my files in Outlook Express cannot be backed up by time, and only the folder compression function can be used. Now I have more than 900 emails in Express. How can I archive them by time? I searched for the toolbar of Express. It seems that there is no such tool !..... Monkey: You can set the storage location in the options as the location you need to back up your mailbox on demand. Apple: This will store a large file. I just want to split it into several small files by time .. D7103a: Import it to outlook! None Maggie80: I tried it. I can't do it anymore. I only need to import outlook and try again. Li shaoqiang: Can I use Foxmail?