TEST: Transcend JetFlash 780 64GB USB flash drive

Technical data
Image
Manufacturer	Transcend
Model number	TS64GJF780
Storage capacity	64 GB (59 GiB)
Read speed	210 MB/s
Write speed	140 MB/s
Connection	USB Typ A
DRAM Cache	no
Price	ca. 30 USD (= 0,47 $ / GB)
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Compared to the top performer*

Read speed

52 %

Write speed

52 %

*) Test result evaluated according to AS SSD Score within the same size.

AS SSD Benchmark

Standard performance test

The standard test was performed with a 1 GB file. A total score of 52 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	203,76 MB/s	131,54 MB/s
4K in megabytes per second	4,59 MB/s	0,05 MB/s
4K-64Thrd in megabytes per second	2,02 MB/s	0,05 MB/s
Access time in milliseconds	0,997 ms	80,587 ms
Score	27	13
Total score	52

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 June 24, 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	120,00 MB/s	8,95 s
Program many small files	20,37 MB/s	69,08 s
Game small and large files	55,54 MB/s	24,86 s

Compression Performance Test

Here, the writing and reading speed of the the Transcend USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 210MB/s and 140MB/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	214,97	141,19
SEQ1M Q1T1	215,02	143,21
RND4K Q32T16	7,46	0,13
RND4K Q1T1	6,01	0,07

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 64 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 64 GB Transcend USB flash drive . The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they can be written and read.

The benchmark test was performed on June 24, 2020.
Information about the test system can be found at the bottom of the home page.
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