Drobo has designed the 5D3 for media professionals, content creators, and small businesses It is equipped with five 3.5" SATA drive bays that support 3.5/2.5" SATA III 6 Gb/s and SATA II 3 Gb/s hard drives and SSDs. The 5D3 distinguishes itself from the original Drobo 5D and 5Dt through the inclusion of Thunderbolt 3 technology, which is accessed through two integrated Thunderbolt 3 ports. While one of the Thunderbolt 3 ports is used to connect the 5D3 to your compatible system, the second one is used to daisy-chain up to six Thunderbolt devices together, including one 5K display or two 4K displays. The Thunderbolt 3 ports also provide 15W of charging power for Thunderbolt 3 laptops, and there is also one USB 3.0 Type-C port, which transfers data at speeds up to 5 Gb/s. Please be aware that the 5D3's Thunderbolt 3 ports are only compatible with Mac, while the USB 3.0 Type-C port can be used with both Windows and Mac. Mac support includes APFS/macOS High Sierra.
To facilitate data protection, Drobo's BeyondRAID technology enables single or dual-drive redundancy. If there are any empty drive bays, BeyondRAID allows additional drives to be inserted into the array, where they would be automatically configured. If all drive bays are occupied, simply replace the smallest capacity drive with a larger one and BeyondRAID will handle the rest. BeyondRAID is also what allows drives of varying capacities to work in the same unit, which helps enable future expansion as larger drives become available.
Additional data protection is provided by the included rechargeable battery, which helps protect data stored in the 5D3's cache. If there were to be a sudden power loss, the battery allows the Drobo to stay powered long enough for the cached data to be written to non-volatile storage. Cooling is provided by a 120mm variable-speed fan and once installed, the hard drives can be configured to spin down when they're not in use, helping to further reduce noise and energy. Also, the LEDs can be dimmed to reduce light pollution when working in sensitive environments. The Drobo 5D3 also includes a 3.3' Thunderbolt 3 cable and a 6.0' power cord with a power supply that operates using 100-240 VAC at 50-60 Hz.