TEST
YOUR USB

WD (ExtHD)

Elements 25A3 18TB

▲ 500 ▼

Release date ≈ Q1 2021.

Average Bench: 85.6% (5th of 639)

Based on 370 user benchmarks.  Device: VID 1058 PID 25a3 Model: WD Elements 25A3
Poor: 37%Average: 85.6% Great: 110%

Very good average bench

The WD Elements 25A3 18TB averaged just 14.3% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the WD Elements 25A3 18TB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 9.44MB/s
Avg. 4K Random Write Speed 8.47MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the WD Elements 25A3 18TB is 73.2%. This is a particularly wide range which indicates that the WD Elements 25A3 18TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Read Speed 2.63MB/s
Avg. 4K Random Read Speed 5.24MB/s
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Average Bench

(Based on 370 samples)
Rank 585.6%
Min Avg Max
40.7 Read 169 225
38.6 Write 167 224
33.3 Mixed 129 165
32.1 SusWrite 155 223
209% 155 MB/s
Min Avg Max
1.1 4K Read 5.24 7.95
5.6 4K Write 8.47 10.1
1.16 4K Mixed 2.2 2.7
382% 5.3 MB/s
Min Avg Max
1.9 DQ Read 2.63 3.4
8.9 DQ Write 9.44 10.1
1.7 DQ Mixed 2.04 2.4
400% 4.7 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
1.5TB free, PID 25a3
Operating at USB 3.1 Speed
SusWrite @10s intervals: 218 227 228 223 223 223 MB/s
109% Outstanding
Read 213
Write 220
Mixed 162
SusWrite 224
279% 205 MB/s
4K Read 6.5
4K Write 9.2
4K Mixed 2.6
426% 6.1 MB/s
DQ Read 3.2
DQ Write 8.8
DQ Mixed 2.6
400% 4.87 MB/s
986GB free, PID 25a3
Operating at USB 3.1 Speed
SusWrite @10s intervals: 194 197 193 200 198 197 MB/s
92.6% Outstanding
Read 116
Write 116
Mixed 111
SusWrite 196
190% 135 MB/s
4K Read 4.9
4K Write 10.4
4K Mixed 2.1
443% 5.8 MB/s
DQ Read 2.3
DQ Write 9.7
DQ Mixed 1.9
403% 4.63 MB/s
12TB free, PID 25a3
Operating at USB 3.1 Speed
SusWrite @10s intervals: 61 12 37 39 44 12 MB/s
73.7% Very good
Read 206
Write 200
Mixed 154
SusWrite 34.1
190% 149 MB/s
4K Read 1.8
4K Write 11.7
4K Mixed 1.2
445% 4.9 MB/s
DQ Read 1
DQ Write 11.4
DQ Mixed 1.7
449% 4.7 MB/s
370 MORE »
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  • Best user rated - User sentiment trumps benchmarks for this comparison.
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.

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