Disk Station DS212j from Synology is a popular NAS-server with space for two internal harddisk drives and possibility to connect more via Usb ports. RAID1 disk mirroring also functions well. The network connectivity handles up to 1000 Mbit/s. Released in 2011.
Number of hard drive slots: 2 Type of RAID: RAID 0, RAID 1, JBOD