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Synology 20TB HAT3320 Plus Series SATA III 3.5" Internal NAS HDD ( HAT3320-20T)
- Reliable Always-On Operation - Backed by up to a 1.2 million hours MTBF1 and 180 TB/year workload rating
- Tested for Maximum Reliability - Stringent validation and over 500,000 hours of testing ensure reliability in Synology systems
- Seamless Firmware Updates - Firmware updates can be performed directly in Synology DSM
- Reliable Recording Technology - Conventional magnetic recording (CMR) technology offers consistent performance
- Retail or OEM packing may vary
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Overview
Specs
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SYNOLOGY HAT3320 20TB PLUS SERIES SATA HDD 3.5IN
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 5 years
- Limited Warranty period (labor): 5 years
- Read full details
Return Policies
- Return for refund within: 30 days
- Return for replacement within: 30 days
- This item is covered by Newegg.com's 30-Day Return Policy.
- Read full return policy for details.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-425-296-3177
- Support Website
- View other products from Synology Inc.
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The Synology HAT3320-20T is a 20TB, 7200 RPM, 3.5-inch SATA NAS hard drive suited to users who need high-capacity storage for compatible Synology systems, with CMR recording, a 180 TB/year workload rating, and firmware updates through Synology DSM.
Recommended For
- Synology NAS owners adding high-capacity storage for shared folders, backups, and other always-on, multi-user home or small-office workloads—after confirming their NAS model supports the drive.
- Home media and photo-video archivists who need a large-capacity drive in a Synology NAS for storing and serving files, rather than a portable or low-latency working drive.
- Small-office teams that keep a Synology NAS running around the clock for centralized file access and routine backups, within the drive’s rated workload.
- Synology NAS users upgrading a drive who value CMR recording and firmware updates through DSM, provided the exact NAS model is listed as compatible.
Real-World Use Scenarios
- When a home or small office NAS is running low on space, adding this drive can provide room for a larger shared file library while keeping files accessible to multiple users on the network.
- For households backing up several PCs or Macs to one Synology NAS, the drive can serve as added capacity for scheduled backups; recovery still depends on the NAS setup and any separate backup copies.
- For a growing photo and video collection, using the drive in a Synology NAS can expand local storage for organizing and accessing media across household devices, subject to the NAS and network setup.
- In a small office where several people access NAS files throughout the day, this Plus Series drive is positioned for always-on, multi-user storage; day-to-day responsiveness will also depend on the NAS, network, and workload.
- For a home or small-office camera system using Synology Surveillance Station, the drive can add NAS space for recorded footage; how long recordings are retained depends on camera count, recording settings, and the storage-pool configuration.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | High-capacity NAS storage and daily computing, with support for always-on operation |
| Capacity | 20TB |
| Interface And Form Factor | 3.5-inch internal drive with a SATA III interface |
| Performance | 7200 RPM, 1GB cache, and a listed read/data transfer rate of 295 MB/s |
| Reliability And Recording | CMR recording, up to 1.2 million hours MTBF, and a 180 TB/year workload rating; validated with over 500,000 hours of testing |
| Firmware | Firmware updates can be performed directly in Synology DSM |
| Model Identifiers | Synology HAT3320-20T |















