TEST: SanDisk Ultra Slider 256GB USB flash drive

Technical data
Image
Manufacturer	SanDisk
Model number	SDCZ480-256G-G46
Storage capacity	256 GB (233 GiB)
Read speed	400 MB/s
Write speed	not specified
Connection	USB Typ C
Price	ca. 22 AUD (= 0,09 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

38 %

Write speed

18 %

*) 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 106 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	397,41 MB/s	175,57 MB/s
4K in megabytes per second	9,58 MB/s	3,43 MB/s
4K-64Thrd in megabytes per second	9,25 MB/s	3,39 MB/s
Access time in milliseconds	0,269 ms	1,540 ms
Score	59	24
Total score	106

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 July 20, 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	161,68 MB/s	6,64 s
Program many small files	32,71 MB/s	43,02 s
Game small and large files	57,93 MB/s	23,84 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 400MB/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	419,31	186,95
SEQ1M Q1T1	417,20	186,94
RND4K Q32T16	13,84	3,74
RND4K Q1T1	13,52	3,71