My confession: I have thousands of messages in my Outlook* inbox and so when I want to find that 'one message' from someone or about something, I want the fastest search method.
Instead of using folders to organize email, I use a combination of assinging categories to a message and using the easy to use advanced search features.
- search by Subject
- search by From
- search by Has Attachment
- search by many more options
Give the advance search functions a try, as illustrated in the screenshots below. The same logic to searching when you use most mail applications including Gmail, Mail (Mac) both on a grown up computer and a smart phone.
* Currently, Outlook 2016 is installed on Windows 7.