This post would focus on the log‑file generation and optional delete‑after‑download features. Aryson Yahoo Backup Tool logs detailed conversion steps, including user actions and file counts. It also lets you delete emails from Yahoo server after backup to free space, with full tracking It supports exporting Yahoo Mail to PST, MBOX, MSG, PDF, TXT, HTML, MHT, EML, EMLX, plus CSV, DOC, DOCX, GIF, JPG, TIFF, and DOCM. 

Maintains folder hierarchy, metadata, and attachments, and offers filters by date and folder, duplicate removal, and migration to Gmail, Office 365, Thunderbird, Outlook.com, and other IMAP‑based clients without Outlook. Compatible with all major Windows editions. The interface is intuitive, and you can evaluate with a free demo.