What does eSATA primarily connect to?

eSATA, or external Serial Advanced Technology Attachment, is primarily used to connect external hard disks to a computer. This interface is specifically designed for connecting external storage devices, allowing for high-speed data transfer and performance that can match internal SATA connections.

Unlike some other options, such as printers or networking equipment, eSATA focuses on storage connectivity. It facilitates a direct and efficient way for users to expand their storage capabilities, access large files, or back up data without the bottleneck often associated with USB connections. Additionally, eSATA supports hot-swapping, which means that devices can be connected or disconnected while the computer is running, further enhancing its usability for external hard disk drives. This characteristic makes eSATA a preferred choice for those needing reliable and fast connections to high-capacity storage solutions.