High-speed and stable hard disk expansion - Uses the JMB582 chip solution for high transmission speed and stable performance, designed to meet users' needs for expansive data space. Wide range of hard disk expansion applications - Suitable for PC computers, servers, industrial computers, consumer electronic devices, storage devices, and NVR/DVR systems, providing flexible storage expansion across multiple environments. Easy to use hard disk expansion - Driver-free and plug-and-play. Features two standard SATA interfaces. Install the card into the motherboard M.2 slot, then use a SATA cable to connect the two interfaces to an SSD or mechanical hard disk at the same time. Secure hard disk expansion - PCIe 3.0 total bandwidth with a heat sink on the chip for efficient cooling, enabling faster data transmission and more stable storage devices for everyday use and gaming. 2-3 practical use scenarios - Desktop upgrade: expand storage for media libraries, video editing projects, or large data sets without relying on external drives. - Server or surveillance: increase capacity for log files, backups, or continuous video retention in NVR/DVR systems and enterprise applications. - Industrial and embedded systems: add reliable, large-capacity storage for data logging, offline data storage, and long-term retention in harsh environments.