10 Best Automatic Backup External Hard Drive 2026 in the United States

The WD 28TB My Book Duo is a strong choice if you need a very large storage capacity for automatic backups, offering 28 terabytes which is enough for extensive personal or business use. It supports RAID-0 out of the box, which boosts transfer speeds up to 360 MB/s, making file transfers relatively quick for such a large drive. The device connects via USB 3.1 and is backward compatible with USB 3.0, ensuring it works with most modern Windows PCs without fuss. It includes two USB 3.0 hub ports for additional connectivity options. In terms of security, the drive features 256-bit AES hardware encryption along with password protection, which helps keep your data safe from unauthorized access. The included WD Discovery software supports automated backups and drive management, making it easier for users who want a set-it-and-forget-it solution.

The build uses aluminum or steel, which should provide decent durability for a desktop device, though it is somewhat heavy at over 7 pounds and designed to stay stationary rather than be portable. One important consideration is compatibility: the drive comes formatted in NTFS for Windows and will require reformatting to work with Macs or other operating systems, which can be inconvenient if you plan to switch devices. Its 5400 RPM speed is typical for desktop drives but not the fastest, so if ultra-high speed is critical, this might not be the ideal choice.

Some users note that while the capacity and features are impressive, occasional software or hardware quirks can arise, but the 3-year warranty offers peace of mind. This drive suits users needing massive, secure, and relatively fast automatic backups primarily on Windows systems who prefer a reliable desktop setup.

The WD 24TB My Book Desktop External Hard Drive is a solid choice if you need a large amount of storage for backing up lots of files like photos, videos, and documents. With 24 terabytes of space, it offers plenty of room for personal or business use. It connects via USB 3.2 Gen 1, providing good transfer speeds suitable for everyday backup tasks, although it's not the fastest on the market. The drive supports both Windows and Mac right out of the box, so it’s convenient if you switch between these systems. Its aluminum enclosure helps with durability, but since it's a mechanical (spinning) hard drive, it can be more vulnerable to shocks compared to solid-state drives.

Security-wise, it has hardware encryption and password protection, which helps keep your data safe from unauthorized access. The included backup software adds extra protection by defending against ransomware, making it easier to manage backups automatically. As a desktop external drive, it requires external power and is less portable than smaller drives. This product suits users who need extensive storage capacity and reliable security features for home or office backup rather than portable use or very fast data transfers.

The Western Digital 20TB My Book Duo is a high-capacity external hard drive designed for automatic backups and large data storage. Its 20TB space is excellent for users with extensive files, whether personal, gaming, or business-related. The drive supports USB 3.1 with transfer speeds up to 360 MB/s, making file transfers fairly quick, though not the fastest available. It comes RAID-0 ready, allowing improved performance or data redundancy if configured, which is useful for data safety. The aluminum enclosure adds durability, but as a desktop 3.5-inch drive, it’s less portable and requires external power, making it best suited for stationary use. Compatibility-wise, it works smoothly with desktop devices and includes USB-C and USB-A cables for flexible connection options.

Security is a strong point here, featuring 256-bit AES hardware encryption and password protection to safeguard your backups. The included WD software simplifies automatic backups, making it user-friendly even for those less familiar with tech. However, the drive’s size and weight (over 5 pounds) limit portability, and it’s primarily designed for desktop setups rather than on-the-go use. If you need a reliable, large-capacity solution with good speed and solid security for home or office backup, the My Book Duo fits well. But if portability or ultra-fast transfers are priorities, you might want to explore other options.