Select a set of messages then Ctrl+S to save them as eml files. Eml files can be opened in any mail app, or imported to a subfolder of Local Folders in TB by drag and drop from File Explorer.

Thank you, but I need a little more help since I am not familiar with "Eml" or "TB." I think you are saying to select emails to transfer and then Ctrl+S. Then what? And will a copy of the emails move or will that happen and the emails will be deleted from Thunderbird page?

Select one message, then Ctrl+S to save it as a file with an .eml extension, to the directory of your choice. Try it, the message remains in TB.

Almost there. How do I "save it as a file with an .eml extension"? I'm on a steep learning curve, and you have been very helpful.

Got it!! Thanks again.

To email files, just attach them to your email before sending. Most email providers like Gmail, Outlook, or Yahoo have an attachment button (usually represented by a paperclip icon). Click on it, select the file you want to attach from your device, and then hit 'Send' once everything is ready. Make sure the file size is within the email provider’s limit (usually around 25MB). For larger files, you may want to use a file-sharing service. You can visit ModEngine2 for additional tips on managing email attachments.