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WD Red Pro 10TB NAS WD103KFBX

WD103KFBX
WD Red PronasCMR10TBSATA-6G3.5"
$51.00/TB
$509.99
newIn Stock
This offer: sold by Amazon.com · Amazon says New / Unknown
Price updated
Price accurate as of Nov 4, 2026, 12:00 AM
Buy on Amazon

The WD Red Pro 10TB NAS WD103KFBX is a 10TB SATA-6G HDD in new condition. It is in stock at $509.99 - $51.00/TB.

Where this listing sits: every 10TB hard drive · 10TB SATA drives · WD 10TB SATA — each page is the live ranking for that slice of the catalogue.

Same capacity, other options
DriveInterfaceCond$/TBPrice
MDD 10TB SATA 6G 7200RPM EnterpriseSATA-6GRefurb$30.00$299.99Buy on Amazon
HGST Ultrastar He10 10TB SASSAS-12GRefurb$30.90$308.99Buy on Amazon
WD Ultrastar 10TB SATA HUH721010ALE600SATA-6GRefurb$31.00$309.99Buy on Amazon
HGST Ultrastar He10 10TB SATA NASSATA-6GRefurb$31.90$319.00Buy on Amazon

All 10TB drives we track, ranked by cost per terabyte.

Model context

CMRSource: WD Red Pro NAS HDD data sheet Recording technology for this model

Part of the WD line we track.

Quick Verdict

The WD Red Pro 10TB NAS WD103KFBX is a 10TB SATA-6G enterprise drive at $51.00/TB - CMR recording makes it safe for all RAID levels and NAS deployments. New unit with full manufacturer warranty.

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Specifications

Capacity10TB
Form Factor3.5"
InterfaceSATA-6G
Recording TechCMRnot sourced
RPM7200
Cache512MB
Sector Size—
Workload Rating—
Warranty—
ASINB0DF9C92SW
Market context

Against every other drive we have an in-stock price for today, this one is cheaper per tb than 33% of them (79 of 243). The cheapest we can currently buy is $14.99/TB; the middle of the market is $37.99/TB.

Where the wider market has moved

These are third-party figures about the retail market as a whole, quoted and dated. They are not our own measurements and they do not describe this specific drive.

Compare against every 10TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 10TB SATA-6G
#1HGST Ultrastar He10 10TB SATA NAS
$31.90/TB
#2WD Purple Pro 10TB WD101PURP
$31.99/TB
#3Seagate SkyHawk AI 10TB ST10000VE0008
$32.00/TB
#4Seagate SkyHawk AI 10.0TB
$32.00/TB
#5WD Red Pro 10TB NAS WD103KFBXTHIS DRIVE
$45.00/TB

Works in these NAS machines

QNAP TS-664
Vendor-listed
On QNAP's TS-664 list as NAS Red Pro WD103KFBX
QNAP TS-673A
Vendor-listed
On QNAP's TS-673A list as NAS Red Pro WD103KFBX
Asustor (15 NAS series)
Vendor-listed
On Asustor's list as Red Pro WD103KFBX
UniFi UNAS / UNVR
Fit-verified
Meets Ubiquiti's written 1TB+ CMR requirement; check the 7200RPM clause

Resolved against manufacturer compatibility lists we read and dated, capped at 4. Vendor-listed means the manufacturer names this exact part number; fit-verified is our own check of form factor, interface and recording technology against a published requirement. Neither is a guess, and a drive the registry cannot resolve shows nothing here rather than a maybe. How compatibility actually works

Also appears in

SATA hard drives
Price per terabyte
CMR or SMR
NAS hard drives
Recertified
By workload
Other pages
Hard drives by capacity
Brands

Frequently Asked Questions

Yes. At our last check it was $509.99 ($51.00 per terabyte at its 10TB capacity), sold new under ASIN B0DF9C92SW. Amazon sets the final price at checkout.

This listing (WD103KFBX, ASIN B0DF9C92SW) carries no renewed, recertified, refurbished or pulled claim in its title, and Amazon reports it as new. On this site that is what "new" means: sold as factory-new.

The WD103KFBX's stored recording technology is CMR (manufacturer-sourced), which rebuilds predictably in RAID.

Use Case Scenarios

🏠
Home & SMB NAS
Building a mid-range NAS for media, backups and file sharing.
✓ Excellent fit
CMR recording is RAID-safe and fully compatible with Synology, QNAP, TrueNAS and UnRAID. New drives come with full warranty.
💾
Backup Server / Veeam Target
Dedicated backup storage for Veeam, Commvault, or NetBackup.
✓ Excellent fit
10TB SATA drives are ideal for backup targets. SATA gives maximum $/TB for backup repositories.
🏗️
Virtualization Host Storage
VM images and snapshots on Proxmox, VMware or Hyper-V.
~ Good fit
Suitable for VM storage where workloads are not IOPS-intensive. SATA is fine for single-host VM storage. Consider NVMe cache for latency-sensitive VMs.

Maintenance & Troubleshooting

Maintenance Checklist

On installCheck SMART baseline on arrival
Run smartctl -a /dev/sdX and record: Reallocated_Sector_Ct, Power_On_Hours, Spin_Retry_Count. Establishes baseline for future comparison.
MonthlyRun SMART short self-test
smartctl -t short /dev/sdX — takes 1-2 minutes, catches most developing issues. Schedule during off-peak.
QuarterlyRun SMART long self-test
smartctl -t long /dev/sdX — full surface scan, takes 5 hours for 10TB. Any test failure is grounds for immediate replacement.
QuarterlyCheck RAID array health
Verify no degraded drives. A degraded array with no hot spare is one failure from data loss. Check mdstat or controller UI.
AnnuallyVerify drive firmware version
Check WD support site for firmware updates. Some versions have known bugs affecting integrity.
Every 3-5 yearsPlan proactive replacement
Enterprise HDDs have higher failure rates after year 4-5. At 10TB per drive, budget for replacements before failures occur.

Troubleshooting Guide

Cause: Loose SATA data or power cable, failed port, or drive not spinning up.
Fix: Reseat both cables. Try a different port. Listen for spin-up sound. Test with a known-good cable.