The manufacturer numbers in the housing (with pushed-out stick visible) reveal two different product groups.
1. numbers ending in AAR or AAJ - these sticks write with about 7-9 MB / s only half as fast as the others. During a test run H2testw sporadic errors occurred in writing and reading and the rate fluctuated significantly. Memory Size loud H2tesw 14770 MB.
USB 2.0 - Write 7-10 MB / s - read 25-28 MB / s
USB 3.0 - Write 7-10 MB / s - read 40-55 MB / s
For me, those were the colors Orange, Blue, Green, Pink - Packaging know these sticks manufacture in Taiwan from.
2. numbers ending in IML - these sticks write with about 17-20 MB / s not super fast, but so are at USB 2.0 to the faster drives. H2testw runs without problems and the writing or reading speed remains quite stable over the entire process. Memory Size loud H2tesw 15185 MB.
USB 2.0 - Writing 17-20 MB / s - read 25-28 MB / s
USB 3.0 - Writing 17-20 MB / s - Read 60 MB / s maybe more ...
For me, those were the colors purple, gray, yellow - packaging know these sticks manufacture in China.
A test to USB 3.0 (via retrofit ExpressCard Notebook on) revealed that the writing speed hardly increases but reading speed increases significantly. Read at 60 MB / s must not be the real maximum because at this retrofit USB 3.0 show most devices maximum values just over 60 MB / s.
CONCLUSION:
You have the "good" sticks, then has one relatively fast Sticks for little money. Similarly, when USB 2.0 is nowadays still an important aspect of such sticks - and because the values are actually pretty good. For USB 3.0 the write values are probably too low to speak to a praise.
In the near future is for the "good" variant a strong buy recommendation in it.
The "bad" sticks I immediately sent back.
The beginning with USB 2.0 but was similar - fast reading was soon to get cheap but fast writing has yet tasted for a long time a lot of money.
