How to archive email receipts?

[cSalmon]

Wondering how others are archiving email receipts? I have folders of email receipts going back many years that I would like to save onto an archive hard drive(s). If there was a way to batch process the emails to save out as pdfs that would be preferred. I'm looking for suggestions and how other people are saving email receipts. At some point I'm going to have to clean out my iCloud storage allotment.

 

[satcomer]

If you have and external you could create a new archive folder and put all your old email in that folder then compress it!