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Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 160TB HDD Storage, 2 x 10GbE LAN Ports, DSM Operating System Bundle with Rail kit
Synology

Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU

Bottom line: The Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU is a specs-and-price decision rather than a crowd-consensus one in the nas & home servers category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For NAS and home-server hardware, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Synology NAS chassis comes in a sealed box.
  • ✓ Backed by Synology's warranty and support channels

Cons

  • ✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

Synology RackStation RS820RP+, made for a variety of server roles such as backup, virtualization, file storage, email servers, & domain controllers; sliding rail kit included for effortless server installation.Form Factor: NAS Rack ServerInternal File System Format: EXT4, BtrfsPorts: 4 x RJ-45 1GbE LAN Ports (with Link Aggregation / Failover support); 2 x USB 3.2 Ports; 1 x eSATA PortProcessor: Atom C3538 4-Core 2.1GHz CPUMemory: 18GB DDR4 non-ECCStorage: 32TB HDD storage for High-Capacity StoragePower: Redundant Power SupplyOperating System: Synology DSM SoftwareFeatures: iSCSI Target…

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SpecPicks Verdict

SpecPicks scored Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU using a rating × review-volume × price-fit model applied to published specs and reviews across the nas & home servers category. Synology's nas & home servers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for nas & home servers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Synology RackStation RS820RP+ is a compact and scalable 4-bay rackmount NAS and is an ideal choice for remote office or small business with limited office space; sliding rail kit is included for easy server installation
  • Atom C3538 4-Core 2.1GHz CPU; 18GB DDR4 non-ECC Memory; 32TB HDD for High-Capacity Storage; 4 x RJ-45 1GbE LAN Ports (with Link Aggregation / Failover support); 2 x USB 3.2 Ports; 1 x eSATA Port; Redundant Power; Btrfs File System for Advanced LUN iSCSI Service
  • Features: Easy to use Synology DSM Operating System, desktop-like layout, iSCSI Target, Backup with Snapshot Replication Technology Support, Near Unlimited File Management and Sharing, Digital Asset Protection, Comprehensive Built-In Security Tools, Redundant Power, and Storage Virtualization Solution Compatibility
  • Synology NAS chassis comes in a sealed box.
  • Hard drives and memory upgrades included separately, NOT installed, installation required.

Full Specifications

Sizec) 160TB HDD Storage
BrandSynology
ConnectivityUSB
Model NumberRS4021xs+
Number of Items1
Warranty DescriptionManufacturer
Full listing titleSynology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 160TB HDD Storage, 2 x 10GbE LAN Ports, DSM Operating System Bundle with Rail kit

Ready to buy?

Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 160TB HDD Storage, 2 x 10GbE LAN Ports, DSM Operating System Bundle with Rail kit is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 160TB HDD Storage, 2 x 10GbE LAN Ports, DSM Operating System Bundle with Rail kit
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