TEST: Lexar Jumpdrive S47 64GB USB flash drive

Technical data
Image
Manufacturer	Lexar
Model number	LJDS47-64GABBK
Storage capacity	64 GB (58 GiB)
Read speed	250 MB/s
Write speed	30 MB/s
Connection	USB Typ A
Price	ca. 13 AUD (= 0,20 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

9 %

Write speed

11 %

*) 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 63 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	39,96 MB/s	21,65 MB/s
4K in megabytes per second	7,09 MB/s	6,80 MB/s
4K-64Thrd in megabytes per second	7,17 MB/s	24,19 MB/s
Access time in milliseconds	0,566 ms	0,884 ms
Score	18	33
Total score	63

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 25, 2022 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	21,48 MB/s	50,00 s
Program many small files	18,16 MB/s	77,46 s
Game small and large files	20,21 MB/s	68,32 s

Compression Performance Test

Here, the writing and reading speed of the the Lexar USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 250MB/s and 30MB/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	39,56	23,04
SEQ1M Q1T1	41,72	29,94
RND4K Q32T16	8,13	7,56
RND4K Q1T1	7,50	5,83