Stop paying for monthly cloud storage. Qubii Duo provides a permanent, one-time purchase solution to backup your digital life. All data is stored 100% offline on your microSD card, ensuring total privacy from hackers and zero reliance on Wi-Fi or cellular data. The only backup cube that seamlessly works across iOS and Android. Whether you are switching from iPhone to Samsung or sharing between family members, Qubii Duo categorizes backups by device name, making it the perfect cross-platform file manager. Designed for non-technical users and busy parents. Simply plug Qubii Duo between your power adapter and charging cable. It triggers an automatic background backup every time you charge, picking up exactly where it left off without interrupting your phone usage. Never run out of space again. Unlike fixed-capacity external drives, Qubii Duo supports microSD cards up to 2TB. When one card is full, the App prompts you to swap, providing limitless expandable storage for 4K videos, ProRaw photos, and essential contacts. Apple MFi Certified with patented technology to protect your battery and device. Integrated with smart detection to avoid duplicate backups, saving card space and ensuring your backup remains organized and easy to restore with one click.