Buffalo Technology TS5820DN8004 80TB 8-Bay NAS

Eight-bay desktop NAS for business teams

The Buffalo TeraStation 5820 delivers 80 terabytes of pre-configured storage across four installed 20-terabyte drives. An Annapurna Labs AL524 quad-core processor at 2.04 gigahertz and eight gigabytes of DDR4 memory handle file serving, backup and virtualization workloads. RAID levels 0, 1, 5, 6, 10 and JBOD are supported out of the box. The unit ships with drives tested and RAID set up, so deployment starts immediately.

Upgrade from single-drive or two-bay appliances

Moving to this eight-bay platform adds native 10-gigabit Ethernet alongside two gigabit ports, removing the network bottleneck that limits smaller NAS boxes. The jump is worth it when concurrent users need sustained throughput for large media files, VM images or database backups. Four empty SATA bays remain for future expansion without replacing the chassis. Buyers who need more than eight drive slots or a rack-mount form factor cannot use this model.

Limits of 10GbE and SATA interfaces

The single 10-gigabit RJ-45 port caps peak network throughput at ten gigabits per second, so aggregated client traffic above that level will queue. Each drive bay uses SATA, so drive speed is bounded by the SATA interface rather than faster protocols. USB 3.0 and 2.0 ports provide peripheral attach points but do not extend the internal storage bus. Power draw reaches 112 watts under load, requiring a standard 100-240 volt AC supply.