TEST: Lexar JumpDrive M900 64GB USB flash drive

Technical data
Image
Manufacturer	Lexar
Model number	LJDM900064G-BNQNG
Storage capacity	64 GB (58 GiB)
Read speed	300 MB/s
Write speed	not specified
Connection	USB Typ A
Price	ca. 23 AUD (= 0,36 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

70 %

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 with a 1 GB file. A total score of 93 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	277,06 MB/s	43,86 MB/s
4K in megabytes per second	12,91 MB/s	4,59 MB/s
4K-64Thrd in megabytes per second	15,43 MB/s	5,07 MB/s
Access time in milliseconds	0,345 ms	0,910 ms
Score	56	14
Total score	93

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 September 25, 2023 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	43,93 MB/s	24,45 s
Program many small files	29,00 MB/s	48,51 s
Game small and large files	39,59 MB/s	34,88 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 300MB/s and 0MB/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	290,45	45,89
SEQ1M Q1T1	292,89	46,34
RND4K Q32T16	20,48	5,92
RND4K Q1T1	12,23	5,11