An easy option to migrate Roundcube to Thunderbird is Yota Roundcube Backup Tool. It allows smooth transfer of emails, contacts, and attachments. The batch migration option saves time by moving everything at once. You can also select only certain emails for migration. The tool preserves email properties and folder structure. It supports all account sizes without any restriction. The software is compatible with all versions of Roundcube and Thunderbird. Its clean interface ensures anyone can use it easily. This is a simple and effective tool for migration.