TEST: Samsung DUO Plus 256GB USB flash driveDUO Plus

Here you can find a detailed performance and benchmark test.
The the USB flash drive DUO Plus with 256GB (MUF-256DB/APC) from Samsung was tested.


Technical data
Manufacturer Samsung
Type MUF-256DB/APC
Storage capacity 256 GB (239 GiB)
Read speed 400 MB/s
Write speed 110 MB/s
Price 64 USD (= 0,25 $ / GB)
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Score
169
Price/GB
0,25 $
Compared to the top performer*
Read speed
41 %
Write speed
12 %

*) Test result evaluated according to AS SSD Score within the same size.

AS SSD Benchmark 2.0

Standard performance test

The standard test was performed with a 1 GB file. Here, a total score of 169 points was achieved.

AS SSD TEST: Samsung DUO Plus 256GB

AS SSD Read: Write:
Seq
in megabytes per second
402,59 MB/s
110,26 MB/s
4K
in megabytes per second
14,50 MB/s
28,73 MB/s
4K-64Thrd
in megabytes per second
15,13 MB/s
31,88 MB/s
Access time
in milliseconds
0,102 ms
0,474 ms
Score
70
72
Total score
169

Copy Performance Test

A common everyday situation is simulated here. Three test folders are created:

  • ISO (folder with two large files)
  • Program (folder with many small files)
  • Game (folder with small and large files)

The three folders are copied using Windows Copy command (the cache remains enabled). The practical test of 19.01.2021 shows the performance for simultaneous write and read operations. The lower the duration, the better.

AS SSD TEST: Samsung DUO Plus 256GB
AS SSD Kopier-Benchmark Transferrate: Dauer:
ISO
two large files
107,11 MB/s
10,03 s
Program
many small files
45,36 MB/s
31,02 s
Game
small and large files
85,46 MB/s
16,16 s

Compression Performance Test

Here, the write as well as read speed (according to the manufacturer 400 MB/s and 110 MB/s) the Samsung USB flash drive is measured depending on the compressibility of the data.

AS SSD TEST: Samsung DUO Plus 256GB

CrystalDiskMark 7.0 Benchmark


Similar to AS SSD, two sequential and two random performance tests are performed.

CrystalDiskMark Benchmark TEST: Samsung DUO Plus 256GB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
423,54
115,61
SEQ1M
Q1T1
419,39
115,44
RND4K
Q32T16
16,99
27,24
RND4K
Q1T1
15,25
30,50

Input/Output operations per second

CDM Read [IPOS] Write [IPOS]
SEQ1M
Q8T1
403,90
110,20
SEQ1M
Q1T1
400,00
110,10
RND4K
Q32T16
4.147,70
6.650,60
RND4K
Q1T1
3.723,10
7.446,30

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
19.740,40
71.829,80
SEQ1M
Q1T1
2.499,13
9.076,70
RND4K
Q32T16
88.939,80
63.976,00
RND4K
Q1T1
268,34
133,68

ATTO Disk Benchmark 4

Here a 256 MB file is written several times to the 256 GB Samsung USB flash drive. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they can usually be written and read.

ATTO Disk Benchmark TEST: Samsung DUO Plus 256GB

HD Tune Pro 5.75 Benchmark

HD Tune writes a 1 GB file to the 256 GB Samsung USB flash drive. The transfer data of the read speed is displayed graphically. The minimum, maximum and average values are also determined. The determined access time and burst rate are also displayed.

HD Tune TEST: Samsung DUO Plus 256GB

SSD-Z 16 Benchmark

Similar to HD Tune, a 500 MB file is written to the 256 GB Samsung USB flash drive here. is written. The transfer data is displayed. The more constant the line, the better.

SSD-Z TEST: Samsung DUO Plus 256GB

Information about the test system can be found at the bottom of the home page.