Desktop hard drives have larger capacity but generally require additional power.
Portable hard drives are the most common, and most practical ones for the everyday photographer. Portable hard drives are small to medium capacity devices that can be powered via a USB connection.
Hard drives also come in two formats, Solid State (SSD) and Hard Disk Drive (HDD). An HDD stores digital information physically onto a disk, while an SSD stores data using interconnected flash memory. HDDs offer the largest capacity of the two, with slower read/write speeds. Whereas SSDs deliver much faster read/write speeds, especially useful for video editors and data wranglers. We recommend using an HDD for desktop drives and an SSD for portable storage. However, as SSD technology continues to improve, we may see the appearance of SSD Desktop storage devices soon.