When selecting an external SSD, two crucial specifications are sustained performance and write endurance. Unlike internal drives, external SSDs are frequently used for transferring files, leading to wear on memory cells due to repeated writing and erasing. For these reasons, a higher TBW (TeraBytes Written) figure is vital, as it indicates the drive's lifespan under typical usage scenarios.
Theoretical maximum speeds often mislead consumers, as peak performance does not always reflect real-world usage. Instead, sustained transfer rates play a significant role, particularly when moving large files, such as 100GB data transfers. A review that includes sustained performance metrics is essential for understanding a drive's true capabilities.
Moreover, hardware encryption is critical for drives that may carry sensitive information. As external SSDs are often at risk of loss or theft during travel, built-in encryption safeguards data, which is especially important for those transporting confidential files.