We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver 3.5 inch hard drive with Synology label, 147 mm long

Synology Inc.

Synology HAT5310-20T 20TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-D5FH-G1G0K MPN HAT5310-20T

A 20 TB, 7200 RPM SATA enterprise drive with 512 MB cache and persistent write cache technology for 24/7 NAS workloads up to 550 TB per year

  • Total capacity20 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • Cache memory512 MB
  • Max height26.1 mm

Capacity 20TB

  • 20 TB capacity supports large NAS storage pools
  • 7200 RPM spindle speed enables fast sequential data access
  • 512 MB cache buffers heavy multi-client workloads
  • Persistent write cache protects data during sudden power loss
  • Rated 2.5 million hours MTBF and 550 TB yearly workload for 24/7 reliability

Purpose-built NAS drive

The Synology HAT5310-20T is a 20 TB 3.5-inch hard drive engineered for Synology NAS systems. It spins at 7200 RPM with a 512 MB cache and connects through a SATA 6.0Gb/s interface. Firmware and DSM tuning raise multi-client sequential read performance by up to 23 percent.

Who it suits and who it does not

This drive suits administrators who need enterprise-grade reliability for 24/7 workloads up to 550 TB per year and a 2.5 million-hour MTBF rating. Persistent write cache technology protects data during sudden power loss. Buyers who need a non-SATA interface or a smaller form factor should look elsewhere.

The deciding specification

The SATA 6.0Gb/s interface determines whether this drive fits your bay and controller. Verify that your NAS or server accepts a 3.5-inch SATA device with a 26.1 mm height before purchasing.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $475.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 20 TB
Higher than about 94% of the 2,372 comparable items (median 2 TB).
Price per TB $23.80 per TB
Cheaper than about 90% of the 2,365 comparable items (median $62.21 per TB).

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSynology
Model nameHAT5310-20T
Total capacity20 TB
Recommended useFor NAS systems
Performance
Rotational speed7,200 RPM
Storage
Cache memory512 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.70 kg
Package size180 × 130 × 33 mm

Other versions of this model

3 more in the same range

Questions about this item

Should I choose the 20TB capacity or a smaller HAT5310 model?

The 20TB model stores the most data per bay and handles up to 550 TB yearly workloads; pick a smaller capacity only if your NAS has fewer bays or your budget is tighter.

What does the 7200 RPM speed mean for my NAS performance?

7200 RPM combined with 512MB cache and DSM firmware tuning delivers up to 23% better sequential multi-client read throughput than standard drives in the same enclosure.

Does the SATA 6.0Gb/s interface limit real-world transfer rates?

The SATA 6.0Gb/s link caps burst transfers at 6.0 Gb/s, while sustained reads and writes are governed by the 7200 RPM platters and 512MB cache in your NAS.

More in 3.5-Inch Internal Desktop HDDs

Similar items