From the Manufacturer
https://www.synology.com/en-global/products/RS818+
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Mfr Part Number: RS818+
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Hardware:
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CPU: Intel Atom C2538 (2.4 GHz, Quad Core) w/ Hardware Encryption Engine(AES-NI)
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Memory: 2GB DDR3 (Expandable, Up to 6GB)
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Drive Bay: 4x 3.5" or 2.5" SATA SSD/HDD (Hard drive not included)
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Maximum Internal Raw Capacity: 48 TB (4x 12 TB drive) (Capacity may vary by RAID types)
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External Ports: 2x USB 3.0 Ports, 1x eSATA Port, 4x RJ45 1GbE LAN Ports
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PCIe: 1x Gen2 x8 slot (x4 link)
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Fan: 2x (40 x 40 mm) Fans
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Power Recovery
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Noise Level: 28.5 dB(A)
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Scheduled Power On/Off
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Wake on LAN/WAN
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Power Supply Unit/Adapter: 150W
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AC Input Power Voltage: 100 ~ 240 V AC
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Power Frequency: 50/60Hz, Single Phase
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Networking Protocols: CIFS, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN)
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Security: FTP over SSL/TLS, IP Auto-Block, Firewall, Encrypted Network Backup over Rsync, HTTPS Connection
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File System:
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Internal: Btrfs, EXT4
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External: Btrfs, EXT4, EXT3, FAT, NTFS, HFS+, exFAT
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File Sharing:
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Maximum Local User Accounts: 2048
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Maximum Local Groups: 256
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Maximum Shared Folder: 512
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Maximum Shared Folder Sync Tasks: 8
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Maximum Concurrent CIFS/AFP/FTP Connections: 500
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Windows Access Control List (ACL) Integration
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NFS Kerberos Authentication
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Utilities: Synology Assistant
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Applications:
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File Station: Virtual drive, remote folder, Windows ACL editor, compress/extract archived files, bandwidth control for specific users or groups, create sharing links, transfer logs
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Backup Solutions: DSM configuration backup, macOS Time Machine support, Cloud Station Backup; Shared folder sync - maximum tasks: 8
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FTP Server: Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL/TLS and SFTP protocol, boot over the network with TFTP and PXE support, transfer logs
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Web Station: Virtual host (up to 30 websites), PHP/MariaDB, 3rd-party applications support
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Supported Clients: Windows 7 and 10, Mac OS X 10.11 onwards
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Power Consumption: 45.28W (Access); 20.81W (HDD Hibernation)
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Certifications: FCC Class A, CE Class A, BSMI Class A, EAC, VCCI, CCC, RCM, KC
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Dimensions (WxDxH): 480.0 x 492.6 x 44.0 mm
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Weight: 6.21 kg
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Package Contents: Main Unit, Accessory Pack, AC Power Cord, Quick Installation Guide
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RoHS Compliant