TEST: Netac ZX20L 512GB external SSD

Technical data
Image
Manufacturer	Netac
Model number	NETAC-ZX20L-500GB
Storage capacity	512 GB (477 GiB)
pSLC-Cache	128 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. 66 AUD (= 0,13 $ / GB)
Paid link	Buy on Amazon

Compare Product

Compared to the top performer*

Read speed

100 %

Write speed

100 %

*) 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 1402 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	1878,96 MB/s	1542,06 MB/s
4K in megabytes per second	27,68 MB/s	68,23 MB/s
4K-64Thrd in megabytes per second	362,99 MB/s	314,53 MB/s
Access time in milliseconds	0,051 ms	0,516 ms
Score	579	537
Total score	1402

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 27, 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	746,46 MB/s	3,08 s
Program many small files	131,32 MB/s	53,60 s
Game small and large files	429,60 MB/s	16,08 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	2052,76	1718,64
SEQ1M Q1T1	1769,89	1525,00
RND4K Q32T16	307,18	391,33
RND4K Q1T1	31,58	77,56