This article covers Synology NASキット 1ベイ DS120j デュアルコアCPU 512MBメモリ搭載 ライトユーザー向け 国内正規代理店品 電話サポート対応品 DiskStation.

Overview

The Synology DS120j is an entry-level 1-bay NAS designed for home users and small families who want a simple, reliable private cloud solution. It strips away complexity, making it an ideal first NAS for those new to network-attached storage. Powered by a Marvell Armada 3700 dual-core processor (800MHz) and 512MB of DDR3 memory, the DS120j supports up to 16TB of raw storage via a single 3.5-inch SATA HDD (sold separately). It runs Synology's DiskStation Manager (DSM), offering a clean web interface for file management, backup, and media serving.

Connectivity & Compatibility

The DS120j features one Gigabit Ethernet (RJ-45) port for wired network access. Two USB 2.0 ports allow connection of external drives or USB flash drives for data transfer and backup, though USB 3.0 is not supported, limiting transfer speeds. It accepts a single 3.5-inch SATA 6Gb/s hard drive (up to 16TB). 2.5-inch drives can be installed with an optional bracket, but the chassis is optimized for 3.5-inch models.

Product Info

Released in 2020, the Synology DS120j sits at the entry level of Synology's NAS lineup. Pricing typically ranges from ¥15,000 to ¥25,000 (without HDD), making it one of the most affordable options from the brand. It comes with a 2-year warranty (for official Japanese distributors) and includes phone and email support. The package contains the unit, power adapter, RJ-45 cable, quick installation guide, and screws. HDD is not included.

Best Use Cases

Centralized data management for personal use: Consolidate photos, documents, and media from multiple devices into one place. DSM mobile apps (DS file, DS photo) enable remote access from anywhere. Family photo and video sharing: Create shareable links to easily exchange large files with relatives living far away. QuickConnect eliminates the need for complex router port forwarding. * Small-team file server: Suitable for a handful of users in a small office or hobby group. Performance degrades with more than 3-4 concurrent users or heavy application loads, so consider a 2-bay model (DS220j or DS224+) for larger groups.

Things to Consider

As a single-bay NAS, the DS120j offers no RAID redundancy. If the drive fails, all data is lost unless you maintain a separate backup. Plan for regular backups to an external USB drive or cloud service. With only 512MB of RAM and an entry-level CPU, multitasking is limited. Running multiple DSM packages (Download Station, Media Server, Surveillance Station) simultaneously will cause noticeable slowdowns. This unit is best for pure file storage and sharing. The lack of USB 3.0 is a notable omission. Backing up to an external drive works, but transfers will be significantly slower than with USB 3.0-equipped models. ## FAQ
Q: What is the maximum supported HDD capacity? A: The DS120j supports up to 16TB per single 3.5-inch SATA HDD. 2.5-inch drives can be used with a bracket, but thermal management and physical stability are less ideal. Q: Does it support hardware transcoding? A: No, the DS120j does not support real-time video transcoding. You can store and stream video files, but playback on mobile devices may require manual conversion beforehand if the format is incompatible. Q: How many concurrent users can it handle? A: For light file sharing and photo browsing, 2-3 simultaneous users is a realistic limit. For 4+ users or heavy tasks (e.g., constant downloading), upgrade to a more powerful model like the DS220j or DS224+.

Product Disclosure (Amazon)

  • Manufacturer: Synology
  • ASIN: B07ZKSLVT5
  • Note: This article covers a manufacturer-made product based on Amazon listing details.