TEST: ADATA UC300 256GB USB flash drive

Technical data
Image
Manufacturer	ADATA
Model number	ACHO-UC300-256G-RBK/GN
Storage capacity	256 GB (0 GiB)
pSLC-Cache	231 GB approx.
Read speed	not specified
Write speed	not specified
Connection	USB Typ C
Price	ca. 33 AUD (= 0,13 $ / GB)
Paid link	Buy on Amazon

Compare Product

Compared to the top performer*

Read speed

10 %

Write speed

2 %

*) 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 40 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	111,21 MB/s	8,30 MB/s
4K in megabytes per second	6,64 MB/s	1,08 MB/s
4K-64Thrd in megabytes per second	7,85 MB/s	1,06 MB/s
Access time in milliseconds	0,825 ms	4,919 ms
Score	26	3
Total score	40

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 13, 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	47,04 MB/s	22,83 s
Program many small files	13,89 MB/s	101,30 s
Game small and large files	29,91 MB/s	46,17 s

Compression Performance Test

Here, the writing and reading speed of the the ADATA USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 0MB/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	113,66	25,36
SEQ1M Q1T1	116,45	88,26
RND4K Q32T16	11,66	1,73
RND4K Q1T1	7,12	1,48