The Synology FX2421 is a high-density 24-bay 2U all-flash expansion unit designed for seamless scalability with Synology FlashStation systems. Supporting both SAS and SATA SSDs, it enables online volume expansion or serves as a high-speed local backup destination. This plug-and-play unit features dual SAS ports for maximum throughput and redundant power supplies to ensure enterprise-grade uptime. Optimized for Synology SAT5200 SSDs, the FX2421 is ideal for I/O-intensive workloads like virtual machines and databases, providing a reliable, low-latency storage growth solution.