DatacenterDisk

Seagate Seagate vs WD WD

Side-by-side spec and price comparison. Live data from Amazon US.

+ Add driveShare comparison
Our Recommendation
👑
Seagate Seagate Expansion 20TB Portable HDD

Seagate Seagate Expansion 20TB Portable HDD offers the best value at $33.50/TB. As a refurb unit, verify SMART data on arrival.

Best $/TB: Seagate
Best Warranty: WD
Best for RAID: Seagate
Full Specification Comparison
Spec
Seagate
Seagate Expansion 20TB Portable HDD
$33.50/TB
WD
WD Elements 20TB Desktop HDD
$45.55/TB
Brand
Seagate
WD
Model
Seagate Expansion 20TB Portable HDD
WD Elements 20TB Desktop HDD
Series
seagate-expansion
wd-elements
Part Number
—
—
$/TB
👑$33.50
$45.55
Price
$669.99
$911.00
Condition
Refurb
New
Capacity
20TB
20TB
Interface
USB 3.0
USB 3.0
Form Factor
Portable-External
Desktop-External
Drive Type
External-HDD
External-HDD
Recording Tech
—
—
RPM
N/A (SSD)
N/A (SSD)
Cache
—
—
Sector Size
—
—
Workload Rating
—
—
DWPD
N/A
N/A
Warranty
—
—
Workload Tier
—
—
In Stock
Check
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
Seagate
WD
NAS Storage
●●●
●●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●●
●●●
Virtualization
●
●
AI/ML Storage
●●
●●
Buying Recommendation
Choose Seagate Seagate Expansion 20TB Portable HDD if:
  • ✓ You need maximum storage per dollar
  • ✓ You're comfortable with datacenter refurb to maximize savings
  • ✓ You need high-density storage for bulk/archive workloads
Buy Seagate →
Choose WD WD Elements 20TB Desktop HDD if:
  • ✓ You need new-with-warranty for compliance or budgeting
  • ✓ You need high-density storage for bulk/archive workloads
Buy WD →

Frequently Asked Questions

Seagate Seagate offers better value at $33.50/TB vs $45.55/TB - a 26% price difference. Factor in warranty length and workload rating when the price gap is small.

Mixing drives of different models in RAID is not recommended even if capacities match. Different firmware, error handling and seek patterns can cause rebuild issues. Use identical drives within the same RAID group for reliable operation.

Both drives carry similar warranty terms and are built for enterprise operation. Check brand-specific AFR data and Backblaze drive stats for real-world failure rate comparisons.

Seagate Seagate is the better fit for NAS storage.