TEST: Seagate Ultra Compact 2TB USB flash drive

Technical data
Image
Manufacturer	Seagate
Model number	STMX2000400
Storage capacity	2048 GB (1863 GiB)
pSLC-Cache	80 GB approx.
Read speed	1000 MB/s
Write speed	1000 MB/s
Connection	USB Typ C
Price	ca. 152 USD (= 0,07 $ / GB)
Paid link	Buy on Amazon

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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 using a 1 GB file. A total score of 1156 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	975,91 MB/s	955,52 MB/s
4K in megabytes per second	42,28 MB/s	90,66 MB/s
4K-64Thrd in megabytes per second	271,45 MB/s	332,89 MB/s
Access time in milliseconds	0,079 ms	0,038 ms
Score	411	519
Total score	1156

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 25, 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	615,73 MB/s	1,74 s
Program many small files	91,63 MB/s	15,36 s
Game small and large files	276,05 MB/s	5,00 s

Compression Performance Test

This measures the write and read speed of the Seagate USB flash drive, depending on the compressibility of the data (according to the manufacturer, these should be 1000 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	1050,35	1024,13
SEQ1M Q1T1	819,33	980,90
RND4K Q32T16	298,16	400,58
RND4K Q1T1	38,84	99,38

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. After approx. 80 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 915 MB/s and written with 524 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 2048 GB Seagate USB flash drive. 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 2048 GB Seagate USB flash drive. 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 2048 GB Seagate USB flash drive here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on February 25, 2025.
Information about the test system can be found at the bottom of the home page.
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