TEST: Transcend JetFlash 820 32GB USB flash drive

Technical data
Image
Manufacturer	Transcend
Model number	TS32GJF820G
Storage capacity	32 GB (28 GiB)
Read speed	150 MB/s
Write speed	20 MB/s
Connection	USB Typ A
Price	ca. 28 USD (= 0,88 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

41 %

Write speed

21 %

*) 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 76 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	147,95 MB/s	23,82 MB/s
4K in megabytes per second	11,28 MB/s	8,58 MB/s
4K-64Thrd in megabytes per second	11,48 MB/s	8,91 MB/s
Access time in milliseconds	0,156 ms	0,726 ms
Score	38	20
Total score	76

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 09, 2020 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	26,17 MB/s	41,04 s
Program many small files	19,36 MB/s	72,68 s
Game small and large files	22,98 MB/s	60,10 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 150 MB/s and 20 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	154,53	25,94
SEQ1M Q1T1	155,04	26,19
RND4K Q32T16	12,92	10,01
RND4K Q1T1	11,83	10,42

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.

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 32 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 32 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 32 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 09, 2020.
Information about the test system can be found at the bottom of the home page.
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