TEST
YOUR USB

Seagate (ExtHD)

Expansion 4TB

▲ 500 ▼

Release date ≈ Q3 2016.

Average Bench: 39.7% (42nd of 639)

Based on 1,000 user benchmarks.  Device: VID 0bc2 PID 231a Model: Seagate Expansion
Poor: 16%Average: 39.7% Great: 56%

Poor average bench

The Seagate Expansion 4TB averaged 60.2% 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 4.11MB/s
Avg. Sustained Write Speed 82.3MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Seagate Expansion 4TB is 40.1%. This is a relatively wide range which indicates that the Seagate Expansion 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.94MB/s
Avg. Sequential Read Speed 61.6MB/s
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Average Bench

(Based on 1,000 samples)
Rank 4239.7%
Min Avg Max
19.2 Read 61.6 104
20.3 Write 79.4 126
21.5 Mixed 55.5 77.8
16.5 SusWrite 82.3 130
97.6% 69.7 MB/s
Min Avg Max
0.4 4K Read 0.94 1.3
2.5 4K Write 4.11 4.9
0.4 4K Mixed 0.57 0.8
163% 1.87 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
2.5TB free, PID 231a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 123 127 128 127 127 128 MB/s
55.5% Above average
Read 97.2
Write 121
Mixed 80
SusWrite 127
148% 106 MB/s
4K Read 1.2
4K Write 4.4
4K Mixed 0.6
174% 2.07 MB/s
2.5TB free, PID 231a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 93 115 116 121 119 119 MB/s
52.5% Above average
Read 99.8
Write 124
Mixed 68.8
SusWrite 114
140% 102 MB/s
4K Read 1.1
4K Write 4.2
4K Mixed 0.7
171% 2 MB/s
3TB free, PID 231a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 96 99 95 99 97 98 MB/s
48.7% Average
Read 96.6
Write 129
Mixed 69.4
SusWrite 97.5
135% 98.2 MB/s
4K Read 1
4K Write 4.3
4K Mixed 0.7
174% 2 MB/s
2.5TB free, PID 231a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 114 114 114 114 115 115 MB/s
45.1% Average
Read 45.7
Write 61.6
Mixed 62.3
SusWrite 114
103% 70.9 MB/s
4K Read 0.5
4K Write 4.4
4K Mixed 0.5
168% 1.8 MB/s
212GB free, PID 231a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 73 76 77 72 69 74 MB/s
42.9% Average
Read 88.4
Write 105
Mixed 77.2
SusWrite 73.5
118% 86.1 MB/s
4K Read 1.1
4K Write 4.5
4K Mixed 0.6
178% 2.07 MB/s
3TB free, PID 231a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 93 86 86 87 90 92 MB/s
40.5% Average
Read 99.5
Write 110
Mixed 30.5
SusWrite 88.9
109% 82.2 MB/s
4K Read 0.9
4K Write 2.1
4K Mixed 0.6
95% 1.2 MB/s
930GB free, PID 231a
Operating at USB 2.1 Speed
SusWrite @10s intervals: 23 25 25 24 25 25 MB/s
8.79% Terrible
Read 20.5
Write 20.6
Mixed 23.9
SusWrite 24.5
31% 22.4 MB/s
4K Read 2
4K Write 0
4K Mixed 0.7
31% 0.9 MB/s
1,000 MORE »
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.

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