DS420j is a 4-bay desktop NAS designed for home data backup, file syncing, and sharing. Supporting up to 64 TB raw capacity, you can easily centralize all your multimedia collections. Specification CPU Model Realtek RTD1296 CPU Quantity 1 CPU Architecture 64-bit CPU Frequency 4-core 1.4 GHz Hardware Encryption Engine System Memory 1 GB DDR4 non-ECC Storage Drive Bays 4 Compatible Drive Type* (See all supported drives) •3.5' SATA HDD •2.5' SATA HDD •2.5' SATA SSD Maximum Internal Raw Capacity 64 TB (16 TB drive x 4) (Capacity may vary by RAID types) Maximum Single Volume Size* 108 TB External Ports RJ-45 1GbE LAN Port 1 USB 3.0 Port 2 Internal Drives •EXT4 External Drives •EXT4•EXT3•FAT•NTFS•HFS+•exFAT* Size (Height x Width x Depth) 184 mm x 168 mm x 230 mm Weight 2.21 kg Fan Speed Mode •Full-Speed Mode•Cool Mode•Quiet Mode•Low-power Mode Brightness Adjustable Front LED Indicators Power Supply Unit / Adapter 90 W AC Input Power Voltage 100 V to 240 V AC Power Frequency 50/60 Hz, Single Phase Warranty 2 Years