TEST: Transcend JetFlash 920 256GB USB flash drive

Technical data
Image
Manufacturer	Transcend
Model number	TS256GJF920
Storage capacity	256 GB (233 GiB)
pSLC-Cache	6 GB approx.
Read speed	400 MB/s
Write speed	420 MB/s
Connection	USB Typ A
Price	ca. 39 USD (= 0,15 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

33 %

Write speed

34 %

*) 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 194 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	330,81 MB/s	338,32 MB/s
4K in megabytes per second	14,36 MB/s	21,30 MB/s
4K-64Thrd in megabytes per second	21,30 MB/s	28,58 MB/s
Access time in milliseconds	0,136 ms	0,402 ms
Score	69	84
Total score	194

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 30, 2023 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	273,17 MB/s	3,93 s
Program many small files	143,91 MB/s	9,78 s
Game small and large files	195,12 MB/s	7,08 s

Compression Performance Test

This measures the write and read speed of the Transcend USB flash drive, depending on the compressibility of the data (according to the manufacturer, these should be 400 MB/s and 420 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	362,48	350,96
SEQ1M Q1T1	350,49	347,01
RND4K Q32T16	36,29	31,45
RND4K Q1T1	20,89	24,00

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 50 GB was written to the medium. After approx. 6 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 347 MB/s and written with 97 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 256 GB Transcend 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 256 GB Transcend 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 256 GB Transcend USB flash drive here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on November 30, 2023.
Information about the test system can be found at the bottom of the home page.
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