Yes, it is definitely possible to back up Yahoo emails without losing any data. I used the Aryson Yahoo Backup Tool, and it worked really well. It saved all my emails, including attachments, without changing anything. The folder structure stayed the same, and everything was neat and organized. I could even choose the format I wanted, like PDF or PST. It’s simple to use, and the process was smooth. Nothing was lost, and all my data stayed safe.