TEST: LaCie Portable SSD 2TB external SSD

Technical data
Image
Manufacturer	LaCie
Model number	STKS2000400
Storage capacity	2048 GB (1863 GiB)
pSLC-Cache	24 GB approx.
Read speed	1050 MB/s
Write speed	1000 MB/s
Interface	USB 3.2 Gen 2x1 (10 Gbit/s)
Connection	USB Typ C
Size (LxWxH)	80 x 50 x 10.6 mm
Weight	46 gram
Price	ca. 245 USD (= 0,12 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

51 %

Write speed

49 %

*) 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 1047 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	953,69 MB/s	967,05 MB/s
4K in megabytes per second	23,54 MB/s	87,08 MB/s
4K-64Thrd in megabytes per second	236,55 MB/s	317,41 MB/s
Access time in milliseconds	0,094 ms	0,206 ms
Score	355	501
Total score	1047

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 May 12, 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	632,23 MB/s	3,63 s
Program many small files	73,99 MB/s	95,13 s
Game small and large files	233,68 MB/s	29,56 s

Compression Performance Test

This measures the write and read speed of the external SSD from LaCie, 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	1052,37	1038,72
SEQ1M Q1T1	701,82	979,33
RND4K Q32T16	279,43	401,30
RND4K Q1T1	36,42	96,59

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. 24 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 907 MB/s and written with 623 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the LaCie 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 LaCie 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 LaCie external SSD here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on May 12, 2025.
Information about the test system can be found at the bottom of the home page.
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