TEST: Lexar Jumpdrive M45 64GB USB flash drive

Technical data
Image
Manufacturer	Lexar
Model number	LJDM45-64GABSL
Storage capacity	64 GB (60 GiB)
Read speed	250 MB/s
Write speed	40 MB/s
Connection	USB Typ A
Price	ca. 20 USD (= 0,31 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

64 %

Write speed

22 %

*) 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 122 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	254,50 MB/s	47,49 MB/s
4K in megabytes per second	15,96 MB/s	16,12 MB/s
4K-64Thrd in megabytes per second	16,75 MB/s	16,31 MB/s
Access time in milliseconds	0,119 ms	0,437 ms
Score	58	37
Total score	122

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 February 26, 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	45,59 MB/s	23,56 s
Program many small files	34,34 MB/s	40,97 s
Game small and large files	43,46 MB/s	31,78 s

Compression Performance Test

This measures the write and read speed of the Lexar USB flash drive, depending on the compressibility of the data (according to the manufacturer, these should be 250 MB/s and 40 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	266,68	45,22
SEQ1M Q1T1	267,44	50,03
RND4K Q32T16	19,13	19,71
RND4K Q1T1	16,98	15,88

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 64 GB Lexar 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 Lexar 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.

The benchmark test was performed on February 26, 2021.
Information about the test system can be found at the bottom of the home page.
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