The best Yahoo backup solution should be able to backup all of your email safely and completely, and it should work with a lot of different file types. Using IMAP with email clients manually can be slow and doesn't work well with large mailboxes. If you want a straightforward solution, the TrustVare IMAP Backup Tool is a good choice. It can save Yahoo emails, with attachments, in formats like PST, MBOX, and EML. The utility keeps the folder structure, keeps the data safe, and lets you backup a lot of data at once without any size constraints. It will support all Windows OS versions like 11, 10, 8.1, 8, and 7 without needing any application. You don't need any technical skills for this tool