Internal HDD: 5x 3.5" or 2.5" SATA Expansion Port: 1 Fan: 2x (80 x 80mm) Fan Noise Level: 30 dB(A) Power Recovery: Sync with the paired DiskStation (Default Mode) Power Frequency: 50/60Hz, Single Phase Power Consumption: 45.1 W (Access), 16.5 W (HDD Hibernation) Volume Expansion & Backup When running out of hard drive capacity on the Synology DiskStation, Synology DX513 provides an easy way to immediately scale capacity by additional 5 hard drives. The RAID volume on the Synology DiskStation can be expanded directly without having to reformat the existing hard drives, ensuring the Synology DiskStation continues its service during the capacity expansion. Synology DX513 can be used as a dedicated local backup solution for the Synology DiskStation. When created as a separate volume, the Synology DX513 provides a great backup solution to its local hard disks in case of system failure. Reliable Plug-n-use Design The Synology DX513 is connected to the Synology DiskStation using an expansion cable with custom-designed connectors on both ends, ensuring a reliable connection and maximum t model : ADATA XPG SX6000 Lite 512GB PCIe 3D NAND PCIe Internal Solid State Drive tag : NAS