TEST: Netac ZX20L 1TB external SSD

Technical data
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Manufacturer	Netac
Model number	NETAC-ZX20L-1TB
Storage capacity	1024 GB (931 GiB)
pSLC-Cache	80 GB approx.
Read speed	2000 MB/s
Write speed	2000 MB/s
Interface	USB 3.2 Gen 2x2 (20 Gbit/s)
Connection	USB Typ C
Size (LxWxH)	102 x 30 x 9,2 mm
Weight	37 gram
Price	ca. 106 AUD (= 0,10 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

56 %

Write speed

57 %

*) 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 5 GB file. A total score of 1658 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	1884,81 MB/s	1878,34 MB/s
4K in megabytes per second	30,68 MB/s	69,42 MB/s
4K-64Thrd in megabytes per second	460,35 MB/s	366,56 MB/s
Access time in milliseconds	0,051 ms	0,751 ms
Score	680	624
Total score	1658

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	877,69 MB/s	2,62 s
Program many small files	135,54 MB/s	51,93 s
Game small and large files	488,44 MB/s	14,14 s

Compression Performance Test

Here, the writing and reading speed of the SSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 2000MB/s and 2000MB/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	2055,37	2074,72
SEQ1M Q1T1	1647,43	1773,75
RND4K Q32T16	512,60	434,50
RND4K Q1T1	47,51	70,39