| Summary | Small Business Storage Server. | Small Business Storage Server. |
| Form factor | 4-bay desktop pedestal | 4-bay 1U rack mount |
| Operating system | Windows Storage Server 2008 R2 Essentials | Windows Storage Server 2008 R2 Essentials |
| Capacity | 4 TB (2 x 2 TB), 8 TB (4 x 2 TB), 12 TB (4 x 3 TB), 16 TB (4 x 4 TB) | 8 TB (4 x 2 TB), 12 TB (4 x 3 TB), 16 TB (4 x 4 TB) |
| CPU | Dual Core Intel Atom D525 1.80 GHz | Dual Core Intel Atom D525 1.80 GHz |
| RAM | 2 GB | 4 GB |
| Interface | Gigabit Ethernet x2, USB 3.0 x2 | Gigabit Ethernet x2, USB 3.0 x2 |
| RAID | RAID 1 & 5 | RAID 5 |
| LCD/VGA | LCD screen | VGA port |
| WD Guardian Services |  | |
