A server administrator is selecting hardware for a new backup server. Disk capacity is the most important requirement for the server. Which of the following drive interface types BEST meets this need?

USB is designed for portable external devices and offers limited sustained throughput and capacity compared to internal server storage interfaces, making it unsuitable as a primary backup server drive interface.

SATA (Serial ATA) is the standard interface for high-capacity HDDs, which are available in multi-terabyte sizes at a low cost per GB - ideal for backup workloads where raw capacity matters most. Unlike FC or SCSI, SATA is not designed around low-latency performance, but for backup purposes the capacity-to-cost ratio is the decisive factor. Large SATA HDD arrays can store far more data per dollar than any of the other listed interfaces.

SCSI is a performance-oriented enterprise interface optimized for IOPS and reliability rather than maximizing raw storage capacity at low cost.

Fibre Channel is a high-speed SAN interface focused on low-latency, high-performance block storage - not on cost-effective high-capacity storage needed for backup servers.