TEST
YOUR USB

LaCie (ExtHD)

Mobile Drive 4TB

▲ 500 ▼

Release date ≈ Q3 2019.

Average Bench: 44.4% (32nd of 639)

Based on 8 user benchmarks.  Device: VID 059f PID 10c5 Model: LaCie Mobile Drive
Poor: 29%Average: 44.4% Great: 56%

Below average average bench

The LaCie Mobile Drive 4TB averaged 55.6% 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 3.9MB/s
Avg. Sustained Write Speed 101MB/s

Good consistency

The range of scores (95th - 5th percentile) for the LaCie Mobile Drive 4TB is 26.3%. This is a relatively narrow range which indicates that the LaCie Mobile Drive 4TB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.82MB/s
Avg. Sequential Read Speed 69.4MB/s
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Average Bench

(Based on 8 samples)
Rank 3244.4%
Min Avg Max
29.8 Read 69.4 102
61.9 Write 95 130
52.1 Mixed 66.7 78.3
53.3 SusWrite 101 136
117% 83.1 MB/s
Min Avg Max
0.5 4K Read 0.82 1.4
1.5 4K Write 3.9 4.7
0.2 4K Mixed 0.61 0.8
157% 1.78 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
3.5TB free, PID 10c5
Operating at USB 3.1 Speed
SusWrite @10s intervals: 102 119 119 119 120 121 MB/s
52.1% Above average
Read 93.1
Write 115
Mixed 68.3
SusWrite 117
136% 98.3 MB/s
4K Read 1
4K Write 4.2
4K Mixed 0.7
170% 1.97 MB/s
3.5TB free, PID 10c5
Operating at USB 3.1 Speed
SusWrite @10s intervals: 95 112 105 109 110 112 MB/s
51.6% Above average
Read 102
Write 102
Mixed 63.9
SusWrite 107
127% 93.8 MB/s
4K Read 1.1
4K Write 4.3
4K Mixed 0.7
174% 2.03 MB/s
3.5TB free, PID 10c5
Operating at USB 3.1 Speed
SusWrite @10s intervals: 134 136 135 136 136 135 MB/s
50.7% Above average
Read 47
Write 65
Mixed 52.1
SusWrite 136
109% 74.9 MB/s
4K Read 1
4K Write 4.6
4K Mixed 0.7
184% 2.1 MB/s
3.5TB free, PID 10c5
Operating at USB 3.1 Speed
SusWrite @10s intervals: 130 128 133 131 139 131 MB/s
46.3% Average
Read 88.4
Write 130
Mixed 61.9
SusWrite 132
145% 103 MB/s
4K Read 0.5
4K Write 1.5
4K Mixed 0.2
60% 0.73 MB/s
3.5TB free, PID 10c5
SusWrite @10s intervals: 53 54 54 53 55 55 MB/s
29.5% Poor
Read 48.4
Write 61.9
Mixed 72
SusWrite 54.1
84% 59.1 MB/s
4K Read 0.9
4K Write 3.4
4K Mixed 0.7
143% 1.67 MB/s
20GB free, PID 10c5
SusWrite @10s intervals: 48 63 64 60 54 31 MB/s
29.3% Poor
Read 29.8
Write 80.3
Mixed 70
SusWrite 53.3
87% 58.4 MB/s
4K Read 0.7
4K Write 4.3
4K Mixed 0.5
166% 1.83 MB/s
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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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