NAS Zyxel NAS542

Hardware:

CPU: Freescale Dual Core Cortex-A9 1.2 GHz  
Memory: 1 GB DDR3  
Storage Bays: 4 x 2.5" or 3.5" SATA II hard drives (up to 6TB per drive, 24TB total)
Ethernet Ports: 2 x Gigabit Ethernet RJ-45  
USB Ports: 3 x USB 3.0
SD Card Reader: 1 x SDXC (up to 128GB)
Buttons: Power, Copy/Sync, Reset
Fan: Smart fan design
Software Features:

Operating System: Linux-based
File Systems: EXT4 (internal), NTFS, EXT2, EXT3, EXT4, FAT32, HFS+ (read only), exFAT (external)
RAID Levels: JBOD, 0, 1, 5, 6, 10, 5+ Hot Spare
Network Protocols: CIFS/SMB, NFS, AFP, DHCP client, PPPoE, NTP, iSCSI  
Applications:
Media server (Twonky with DLNA 1.5 and UPnP AV)  
iTunes server  
Logitech media server  
Photo album server  
WebDAV, FTP server, phpMyAdmin/MySQL/PHP  
RSS client & server  
Print server (CIFS)  
Remote access support (DyDNS)  
iOS and Android apps (ZyXEL Drive, zCloud, ownCloud)  
NZBGet, Transmission, pyLoad  
Gallery, WordPress, TFTP, NFS  
Backup:
One-touch copy/sync button  
Backup planner (instant/scheduled)  
NAS to NAS synchronization/archive backup  
Rsync
NAS to external USB hard drive backup  
Google Drive, Dropbox, Memopal, ownCloud, SynBackupfree, NetDrive support  
Apple Time Machine support
Security:
HTTPS and FTPES (FTP over explicit TLS/SSL) support  
Encrypted NAS to NAS remote replication  
Encrypted NAS to external disk archive backup  
User and group management
Package management for applications  
Physical Specifications:

Dimensions: 190 x 225 x 160 mm (WxDxH)  
Weight: 2 kg (without hard drives)  
Power: Input: 100-240V AC, 50/60Hz; Output: 19V DC, 4.74A
Power Consumption: Access mode: 36.5W (max); Hard disk spin-down mode: 14.8W  
Operating Temperature: 0°C to 40°C  
Storage Temperature: -30°C to 70°C
Humidity: 10% to 95% (non-condensing)  
Other Features:

Bolt-free design for easy setup  
Hot-swappable HDD support  
Wake-on-LAN
Scheduled power on/off/reboot  
Smart fan speed control  
High temperature alert/buzzer  
Auto shutdown on high temperature  
APC USB UPS monitoring and auto shutdown