TEST: SSK SD500 2TB external SSD

Technical data
Image
Manufacturer	SSK
Model number	SD500-2TB
Storage capacity	2048 GB (1863 GiB)
pSLC-Cache	>300 GB approx.
Read speed	1050 MB/s
Write speed	1000 MB/s
Interface	USB 3.2 Gen 2x2 (20 Gbit/s)
Connection	USB Typ C
Size (LxWxH)	66 x 38 x 13 mm
Weight	35 gram
Price	ca. 108 USD (= 0,05 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

99 %

Write speed

90 %

*) 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 5 GB file. A total score of 1325 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	1905,24 MB/s	1712,23 MB/s
4K in megabytes per second	28,94 MB/s	79,69 MB/s
4K-64Thrd in megabytes per second	281,42 MB/s	318,37 MB/s
Access time in milliseconds	0,047 ms	0,514 ms
Score	501	569
Total score	1325

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 February 20, 2025 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	895,86 MB/s	2,57 s
Program many small files	77,64 MB/s	90,66 s
Game small and large files	310,00 MB/s	22,28 s

Compression Performance Test

This measures the write and read speed of the external SSD from SSK, depending on the compressibility of the data (according to the manufacturer, these should be 1050 MB/s and 1000 MB/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	2072,64	1886,57
SEQ1M Q1T1	1875,57	1733,65
RND4K Q32T16	286,89	363,88
RND4K Q1T1	36,22	86,46

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 300 GB was written to the medium. The exact cache size could not be determined, because the test file did not exhaust the cache (brought it to the limit). At least the test file could be read with an average write speed of 1947 MB/s and written with 1759 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the SSK external SSD. 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.

ATTO Disk Benchmark

Here, a 256 MB file is written several times to the SSK external SSD. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they were written and read.

SSD-Z Benchmark

Similar to HD Tune, a 500 MB file is written to the SSK external SSD here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on February 20, 2025.
Information about the test system can be found at the bottom of the home page.
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