How do you save all Yahoo Mail attachments before changing email providers?

I'm planning to move away from Yahoo Mail, but before doing so I need to Download Attachments from Yahoo Mail and make sure important files are safely stored. My mailbox contains years of business communications, including contracts, invoices, design files, and project documents.

The problem is that Yahoo only allows me to access attachments through individual emails. With thousands of messages in my mailbox, manually downloading everything could take days. To make matters worse, some attachments fail to download entirely, forcing me to retry multiple times.

I've already tested different browsers, checked my internet connection, and cleared cache files. While these steps occasionally help, they don't solve the problem completely. Because of this, I've been looking into backup methods that preserve both emails and attachments together.

One solution I found during my research was the DRS Softech Yahoo Backup Tool, which many users seem to recommend for downloading mailbox content and attachments in bulk. It appears to be designed specifically for users who need to secure large amounts of Yahoo Mail data before migrating elsewhere.

For anyone who has moved away from Yahoo Mail, how did you save your attachments and email data? Did you rely on manual downloads or use another approach?