TEST: SanDisk Ultra 64GB USB flash drive

Technical data
Image
Manufacturer	SanDisk
Model number	SDCZ48-064G-U46
Storage capacity	64 GB (57 GiB)
Read speed	100 MB/s
Write speed	not specified
Connection	USB Typ A
Price	ca. 8 AUD (= 0,13 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

42 %

Write speed

25 %

*) 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 54 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	167,00 MB/s	59,00 MB/s
4K in megabytes per second	7,61 MB/s	1,35 MB/s
4K-64Thrd in megabytes per second	7,02 MB/s	1,53 MB/s
Access time in milliseconds	0,370 ms	7,762 ms
Score	31	9
Total score	54

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 23, 2024 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	13,48 MB/s	79,68 s
Program many small files	6,59 MB/s	213,35 s
Game small and large files	19,74 MB/s	69,97 s

Compression Performance Test

Here, the writing and reading speed of the the SanDisk USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 100MB/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	176,54	50,32
SEQ1M Q1T1	176,71	52,57
RND4K Q32T16	11,07	2,25
RND4K Q1T1	10,42	1,79