The DS115j is an affordable NAS from Synology, aimed at home users and small office environments. It's a lot simpler than the larger, pricier units sold by the company, since it only supports a single 2.5-inch or 3.5-inch hard disk and comes with a relatively limited processor and memory.But that simplicity is all part of its appeal. Like the larger units, it comes with Synology's superb DiskStation Manager software, which provides a straightforward and intuitive Windows-like graphical interface for using the NAS.