TEST: Netac US9 256GB USB flash drive

Technical data
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Manufacturer	Netac
Model number	NC-US9-256GB
Storage capacity	256 GB (238 GiB)
pSLC-Cache	7 GB approx.
Read speed	1000 MB/s
Write speed	950 MB/s
Connection	USB Typ A+C
Price	ca. 46 AUD (= 0,18 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

94 %

Write speed

89 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed with a 1 GB file. A total score of 845 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	960,38 MB/s	859,69 MB/s
4K in megabytes per second	27,10 MB/s	84,79 MB/s
4K-64Thrd in megabytes per second	149,41 MB/s	256,99 MB/s
Access time in milliseconds	0,045 ms	0,115 ms
Score	273	428
Total score	845

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 November 22, 2024 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD Copy-Benchmark	Transfer rate:	Duration:
ISO two large files	565,99 MB/s	1,90 s
Program many small files	230,44 MB/s	6,11 s
Game small and large files	464,67 MB/s	2,97 s

Compression Performance Test

Here, the writing and reading speed of the the Netac USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 1000MB/s and 950MB/s respectively).

CrystalDiskMark Benchmark

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

CDM	Read [MB/s]	Write [MB/s]
SEQ1M Q8T1	1027,44	911,62
SEQ1M Q1T1	978,08	871,44
RND4K Q32T16	124,17	293,29
RND4K Q1T1	28,38	91,80