Here are a few options for your forum reply, recommending RecoveryTools Yahoo Backup Software and explicitly highlighting how it enables converting Yahoo to EML (as well as other formats) to easily store backup files directly onto a USB flash drive or external hard drive:
Option 1: Detailed & Informative (Recommended)
Backing up your Yahoo Mail directly to an external storage drive like a USB flash drive or external hard drive is a great way to maintain an offline, secure archive of your communications.
A fast and reliable solution for this is RecoveryTools Yahoo Mail Backup Software.
Multiple Export Formats: It easily performs Yahoo to EML conversion (as well as PST, PDF, MBOX, and MSG), allowing you to save universal email files directly onto your connected USB drive.
Direct USB Save: You can set your connected USB flash drive or external hard drive as the destination path, so converted files are saved straight to portable storage.
Full Attachment & Metadata Protection: Retains 100% of attachments, folder structures, and key email headers (To, From, Date, Subject) without data loss.
Selective Batch Backup: Offers filter options (by date range, subject, or folder) so you can back up your entire Yahoo account or just specific folders in bulk.