TEST: Lexar Jumpdrive M45 128GB USB flash drive

Technical data
Image
Manufacturer	Lexar
Model number	LJDM45-128ABSL
Storage capacity	128 GB (116 GiB)
Read speed	250 MB/s
Write speed	40 MB/s
Connection	USB Typ A
Price	ca. 19 AUD (= 0,15 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

25 %

Write speed

9 %

*) 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 105 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	257,42 MB/s	49,92 MB/s
4K in megabytes per second	14,94 MB/s	8,79 MB/s
4K-64Thrd in megabytes per second	15,70 MB/s	9,55 MB/s
Access time in milliseconds	0,269 ms	1,198 ms
Score	56	23
Total score	105

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 March 01, 2021 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	48,89 MB/s	21,97 s
Program many small files	30,23 MB/s	46,54 s
Game small and large files	45,79 MB/s	30,16 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 40MB/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	270,70	63,77
SEQ1M Q1T1	271,40	34,14
RND4K Q32T16	19,06	7,02
RND4K Q1T1	16,62	7,20