• Powerful Performance Over 3,100/2,600 MB/s sequential read/write throughput and over 173,100/80,800 random read/write IOPS2 support heavier applications • On-Demand Expansion Attach up to 2 plug-and-play Synology DX517 Expansion Units3 for up to 18 drive bays and 324 TB or raw storage • Comprehensive Backups Protect your IT infrastructure with license-free solutions for backup, replication, and recovery • Availability Safeguards Maximize uptime with hot-swappable drives, online volume expansion, and Synology High Availability clustering • Long-Term Support Backed by Synology's 5-year limited warranty4