(1) I'm guessing you are using the latest drive:
... Nec USB 3.0 Ver 2.0.30, dtd Dec 21, 2010 (Latest Gigabyte site)
... From Nec, looks like there is a newer version 2.0.4
... You might want to (a) clean all files off drive and run a benchmark program to see how close to spec you get. Crystal disk mark or ATTO. (b) I believe Adata has a low level formater that can return to factory specs ?? See end of post.
For crystal disk mark:
http://crystalmark.info/software/CrystalDiskMark/index-e.html
(2) I can say this, all usb thumbdrives are NOT created equal. Below is USB2 but comment applies to USB3 also
I regularly back up a directory on my work computer, only has usb 2, ( around 14 gigs) and there is a hugh difference in time between brands/models in REAL life - ended up going with the Patriot Xporter XT Rage (have both the 32 and 64 gig models).
Although I have USB 3 on main computer at home and on laptop, I have not gone to usb 3 Thumbdrive yet. Not a lover of adata and patriot a litle on the expensive side yet ($65 for 32 gig).
Looking @ specs for Adata 8 gig - Great price, Read performance, so-so Write - relatively LOW performance. Good reviews, BUT would take with mucho salt!!
On adata formater, quote from Manuf:
Dear Customer, we are sorry that you have had difficulties with our product. Please contact our office we have two low level formatting tools, this will repair the USB to factory condition. After running the formatting tool we can then verify transfer rates through a benchmark. ADATA customer service: Phone: 1-888-962-3282 x604; Email: support@adatausa.com. One of support staff members will be happy to assist you with your case.