Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: what is the transfer speed? 1.0 , 2.0?
Document: I have USB 2.0 ports, but writing to these seems more consistent with USB 1.0 speeds. Note that I have used these on WinXP and Win7 systems with pretty much the same results. This write speed is not a big deal, but something to be aware of. To date, I have written to and read from 3 of these devices with no lost or garbled files. I have used both data and audio files.
Since my group no longer &#34;rips DVDs&#34; for the live performances we have, we edit them into High Def videos and copy them to thumb drives. These are perfect for this: low cost, great quality and speed, and the anodized aluminum cover allows us to have the back etched to indicate the contents and the data of the event.The ten-pack makes it quick and easy to distribute digital data to our members without the bulk of retail packaging.
I bought one of these at my local university. I am constantly using it to transfer information between computers when I don't happen to have internet access. Eight gigs is large enough to hold just about anything that a person would need. The information uploads and downloads smoothly and quickly. The best part is, mine survived a trip through the washer AND dryer. The cap fits on snugly, so it is pretty water tight, meaning no liquid can seep down inside of the port to mess with the electronics.
worked as expected but two of them fell apart. i was heart broken and devastated when it broke. I cried for 3 days.
we  love this so much we put music on them and store on them so we like them alot thank you
this  was a gift they said it works very good as you can keep a wide range of information with you at all times
i use these to put images of weddings on and store...havent had any problems...unlike cheaper kinds....will always use these...very happy
came on time, and so far have worked well, I give them out to collect information back from clients and have had no problems.
Well constructed and all worked well.
They fit the need of storage and use compared to price per unit. I do like the fact that they have a metal case and a small loop can be added for a carrying loop. The plastic cover stays on well even when carried loosely in a pocketfull of change.
Answer: These drives are kind of strange.  It transfers off the drive at high speed (~20 MByte/sec) but only writes at ~2 MByte.  So I think it's USB 2.0 but the internal flash management chip on the drive must be pretty inefficient so it can't keep up with the comm. speed when it's doing write operations.  Delete operations are also really slow.So overall I probably wouldn't recommend this product.  I got them because they were cheap and I don't need high performance for what I'm using them for.