TEST: SSK SD301 256GB USB flash drive

Here you can find a detailed performance and benchmark test of the USB flash drive SD301 with 256GB (SSK-SD301-256GB) from SSK.
Score
491
Price/GB
0,14 €


Technical data
Image SD301
Manufacturer SSK
Model number SSK-SD301-256GB
Storage capacity 256 GB (238 GiB)
pSLC-Cache 69 GB approx.
Read speed 550 MB/s
Write speed 500 MB/s
Connection USB Typ A+C
Price ca. 37 USD (= 0,14 $ / GB)
Paid link Buy on Amazon
Compare Product
Compared to the top performer*
Read speed
51 %
Write speed
50 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed using a 1 GB file. A total score of 491 points was achieved.

AS SSD TEST: SSK SD301 256GB

AS SSD Read: Write:
Seq
in megabytes per second
519,67 MB/s
485,13 MB/s
4K
in megabytes per second
23,86 MB/s
38,14 MB/s
4K-64Thrd
in megabytes per second
87,74 MB/s
148,76 MB/s
Access time
in milliseconds
0,100 ms
0,149 ms
Score
164
235
Total score
491

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 the Windows Copy command (the cache remains enabled). The practical test of August 31, 2023 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD TEST: SSK SD301 256GB
AS SSD Copy-Benchmark Transfer rate: Duration:
ISO
two large files
377,82 MB/s
2,84 s
Program
many small files
170,57 MB/s
8,25 s
Game
small and large files
307,73 MB/s
4,49 s

Compression Performance Test

This measures the write and read speed of the the SSK USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 550MB/s and 500MB/s respectively).

AS SSD TEST: SSK SD301 256GB

CrystalDiskMark Benchmark

Here, two sequential and two random performance tests are performed, similar to the ones performed on the AS SSD.

CrystalDiskMark Benchmark TEST: SSK SD301 256GB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
556,12
512,25
SEQ1M
Q1T1
536,35
484,54
RND4K
Q32T16
133,94
170,39
RND4K
Q1T1
35,20
39,85

Input/Output operations per second

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
530,40
488,50
SEQ1M
Q1T1
511,50
462,10
RND4K
Q32T16
32.701,20
41.599,90
RND4K
Q1T1
8.594,00
9.728,30

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
15.051,60
16.304,00
SEQ1M
Q1T1
1.954,69
2.162,54
RND4K
Q32T16
15.617,70
12.285,50
RND4K
Q1T1
116,22
102,67

HD Tune Pro Endurance test

This is a long term test to make full use of the memory capacity. You can see when a cache is full and the writing performance decreases. A test file of 100 GB was written to the medium. After approx. 69 GB, the pSLC-Cache was full and the performance was throttled.
At least the test file could be read with an average write speed of 524 MB/s and written with 191 MB/s.

HD Tune Endurance Test TEST: SSK SD301 256GB

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 256 GB SSK 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: SSK SD301 256GB

ATTO Disk Benchmark

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

ATTO Disk Benchmark TEST: SSK SD301 256GB

SSD-Z Benchmark

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

SSD-Z TEST: SSK SD301 256GB


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