KitGuru tried the Drobo 5n NAS
A quote from the article:
The Drobo 5n is a 5-bay tower NAS designed for SOHO use that does away with conventional RAID arrays and instead uses Drobo's proprietary BeyondRAID technology. Is Drobo a NAS you should consider over better known brands such as QNAP or Synology?Drobo 5n NAS Review @ KitGuru
