| CPU Model | Intel Atom C2538 | 
| CPU Architecture | 64-bit | 
| CPU Frequency | Quad Core 2.4 GHz | 
| Hardware Encryption Engine (AES-NI) |  | 
| Memory | 
| System Memory | 2 GB DDR3 | 
| Memory Module Pre-installed | 2GB (1 x 2GB) | 
| Total Memory Slots | 2 | 
| Memory Expandable up to | 6 GB (2 GB + 4 GB) | 
| Storage | 
| Drive Bays | 4 | 
| Maximum Drive Bays with Expansion Unit | 8 | 
| Compatible Drive Type* (See all supported drives) | 3.5" SATA HDD2.5" SATA HDD2.5" SATA SSD
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| Maximum Internal Raw Capacity | 48 TB (12 TB drive x 4) (Capacity may vary by RAID types) | 
| Maximum Raw Capacity with Expansion Units | 96 TB (48 TB + 12 TB drive x 4) (Capacity may vary by RAID types) | 
| Maximum Single Volume Size | 108 TB | 
| Hot Swappable Drive |  | 
| Notes | "Compatible drive type" indicates the drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.The maximum single volume size is not directly related to the maximum raw capacity. (Learn more)
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| External Ports | 
| RJ-45 1GbE LAN Port | 4 (with Link Aggregation / Failover support) | 
| USB 3.0 Port | 2 | 
| eSATA Port | 1 | 
| File System | 
| Internal Drives |  | 
| External Drives | BtrfsEXT4EXT3FATNTFSHFS+exFAT*
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| Notes | exFAT Access is purchased separately in Package Center. | 
| Appearance | 
| Size (Height x Width x Depth) | 44 mm x 430.5 mm x 457.5 mm 44 mm x 430.5 mm x 591.8 mm (for RP model)
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| Weight | 6.73 kg 9.36 kg (for RP model)
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| Others | 
| System Fan | 40 mm x 40 mm x 3 pcs | 
| Fan Speed Mode |  | 
| Power Recovery |  | 
| Noise Level* | 25.3 dB(A) 52.8 dB(A) (for RP model)
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| Scheduled Power On/Off |  | 
| Wake on LAN/WAN |  | 
| Power Supply Unit / Adapter | 250W 2 X 250W (for RP model)
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| AC Input Power Voltage | 100V to 240V AC | 
| Power Frequency | 50/60 Hz, Single Phase | 
| Power Consumption* | 36.78 W (Access) 20.57 W (HDD Hibernation)
 45.88 W (Access, for RP model)
 30.74 W (HDD Hibernation, for RP model)
 
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| British Thermal Unit | 125.50 BTU/hr (Access) 70.19 BTU/hr (HDD Hibernation)
 156.55 BTU/hr (Access, for RP model)
 104.89 BTU/hr (HDD Hibernation, for RP model)
 
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| Redundant Power Supply (for xs+ and RP model) |  | 
| Environment Temperature | 
| Operating Temperature | 5°C to 35°C (40°F to 95°F) | 
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) | 
| Relative Humidity | 5% to 95% RH | 
| Certification | FCC Class ACE Class ABSMI Class A
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