Mediasonic HF2-SU3S2 ProBox 4 Bay Hard Drive Enclosure with USB 3.0 & eSATA

Synology DiskStation 4-Bay (Diskless) Network Attached Storage DS411slim (Black)

Synology DiskStation 4-Bay (Diskless) Network Attached Storage DS412+ (Black)

WD My Cloud EX4 Diskless: High-Performance NAS, Ultimate Reliability, Personal Cloud Storage(WDBWWD0000NBK-NESN)

Synology DiskStation 4-Bay (Diskless) Network Attached Storage DS413j

Seagate Business Storage NAS 4-Bay Diskless Network Attached Storage Enclosure STBP100

Drobo 5N 5-Bay NAS Storage Array, Gigabit Ethernet (DRDS4A21)

Seagate Business Storage NAS 4-Bay 8TB Network Attached Storage STBP8000100

WD My Cloud EX4 16TB: High-Performance NAS, Ultimate Reliability, Personal Cloud Storage(WDBWWD0160KBK-NESN)

Seagate Business Storage NAS 4-Bay 16TB Network Attached Storage STBP16000100

Mediasonic HF2-SU2S2 ProBox 4 Bay Hard Drive Enclosure for 3.5" SATA Hard Drives

NETGEAR ReadyNAS 100 Series 104 Diskless 4-Bay Network Attached Storage (RN10400-100NAS)

WD My Cloud EX4 8TB: High-Performance NAS, Ultimate Reliability, Personal Cloud Storage(WDBWWD0080KBK-NESN)

Vantec 4 Bays 3.5-Inch SATA to USB 3.0 & eSATA External Hard Drive Enclosure with Fan (NST-640SU3-BK)

BUFFALO LinkStation Pro Duo 2-Bay Diskless Enclosure High Performance Network Attached Storage (NAS) - LS-WVL/E

Buffalo LinkStation 421e Diskless Enclosure High Performance RAID NAS Personal Cloud Storage and Media Server (LS421DE)

BUFFALO LinkStation Duo 2-Bay 4 TB (2 x 2 TB) RAID Network Attached Storage (NAS) - LS-WX4.0TL/R1

Seagate Business Storage NAS 4-Bay 12TB Network Attached Storage STBP12000100

Synology DiskStation 1-Bay (Diskless) Network Attached Storage DS112 (White)

Dyconn Quartz 4 - 4 Bay RAID and JBOD Enclosure - 3.5 Inch Hard Drive eSATA, USB 3.0, RAID Storage System - Hot Swappable

The above is "Nas 4 Bay, Mediasonic HF2-SU3S2 Probox 4 Bay Hard Drive Enclosure With USB 3.0 & Esata" recommended related products, Please click on the picture to see product details and nas 4 bay reviews!