TEST
YOUR USB

WDC (ExtHD)

WD40 EMRX-82UZ0N0 4TB

▲ 500 ▼

Release date ≈ Q3 2019.

Average Bench: 46% (27th of 639)

Based on 7 user benchmarks.  Device: VID null PID null Model: WDC WD40 EMRX-82UZ0N0
Poor: 34%Average: 46% Great: 63%

Below average average bench

The WDC WD40 EMRX-82UZ0N0 4TB averaged 53.9% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K Random Write Speed 2.39MB/s
Avg. Sequential Write Speed 122MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WDC WD40 EMRX-82UZ0N0 4TB is 29%. This is a relatively narrow range which indicates that the WDC WD40 EMRX-82UZ0N0 4TB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.99MB/s
Avg. Sequential Read Speed 131MB/s
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Average Bench

(Based on 7 samples)
Rank 2746%
Min Avg Max
94.3 Read 131 161
71.2 Write 122 162
81 Mixed 103 125
53.5 SusWrite 89.6 143
148% 111 MB/s
Min Avg Max
0.9 4K Read 0.99 1.1
1.1 4K Write 2.39 2.8
0.6 4K Mixed 0.96 1.1
117% 1.44 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
617GB free, PID null
SusWrite @10s intervals: 130 141 146 146 145 147 MB/s
63.3% Good
Read 161
Write 162
Mixed 125
SusWrite 143
200% 148 MB/s
4K Read 1
4K Write 2.8
4K Mixed 1
133% 1.6 MB/s
789GB free, PID null
SusWrite @10s intervals: 142 141 142 142 142 141 MB/s
58.1% Above average
Read 130
Write 132
Mixed 111
SusWrite 142
176% 129 MB/s
4K Read 1.1
4K Write 2.6
4K Mixed 1.1
130% 1.6 MB/s
617GB free, PID null
SusWrite @10s intervals: 75 73 72 72 71 71 MB/s
47.7% Average
Read 159
Write 157
Mixed 123
SusWrite 72.4
168% 128 MB/s
4K Read 1
4K Write 2.8
4K Mixed 1
133% 1.6 MB/s
659GB free, PID null
SusWrite @10s intervals: 71 72 72 73 72 72 MB/s
40.3% Average
Read 145
Write 71.2
Mixed 96.8
SusWrite 71.8
120% 96.1 MB/s
4K Read 1
4K Write 1.1
4K Mixed 0.6
62% 0.9 MB/s
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