TEST: SanDisk Extreme PRO 256GB USB flash drive

Technical data
Image
Manufacturer	SanDisk
Model number	SDCZ880-256G-G46
Storage capacity	256 GB (238 GiB)
Read speed	420 MB/s
Write speed	380 MB/s
Connection	USB Typ A
Price	ca. 47 AUD (= 0,18 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

40 %

Write speed

39 %

*) 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 186 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	406,76 MB/s	387,48 MB/s
4K in megabytes per second	10,14 MB/s	8,94 MB/s
4K-64Thrd in megabytes per second	10,62 MB/s	42,53 MB/s
Access time in milliseconds	0,820 ms	0,593 ms
Score	61	90
Total score	186

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 December 14, 2020 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	251,36 MB/s	4,27 s
Program many small files	114,77 MB/s	12,26 s
Game small and large files	224,91 MB/s	6,14 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 420MB/s and 380MB/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	433,35	397,66
SEQ1M Q1T1	428,09	393,88
RND4K Q32T16	15,37	10,39
RND4K Q1T1	14,70	9,33