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What's my limiting factor here?

Last response: in Storage
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February 5, 2013 11:07:01 PM

I have a samsung QX411-W01. Stock HDD.

I bought an Adata C103 USB 3.0 16GB flash drive.

Why are my transfer speeds only around 10MB/s according to windows's standard file transfer window. (I assume that is byte, not bit)

Do you think my HDD can only put out 10MB/s? (it is only 5400rpm) Do you think there is something in the pipe to the flash drive? Or, do you think that the flash drive is the limiting factor here? Is there a test that I can do to find out?

I was hoping for about 3 times this in speed, so I was a little disappointed when I found my transfer speed was so slow for 1 to 10gb files. This is my only USB3.0 device and I wasn't expecting like 600mB/s but at least 50.

(Before you ask, yer, I am using the 3.0 port)

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a c 748 G Storage
February 5, 2013 11:28:36 PM

Thats within spec. What speed do you get transferring the file back to the PC.
{The C103 has read speeds up to 90 MB/sec and, write speeds up to 10 MB/sec,}
February 6, 2013 12:52:02 AM

popatim said:
Thats within spec. What speed do you get transferring the file back to the PC.
{The C103 has read speeds up to 90 MB/sec and, write speeds up to 10 MB/sec,}


90MB/s or so. lol Wow, I feel so dumb, I should have thought to look for that. If you have time, I have multiple questions for you: why is the write speed so slow compared to read? Do you think I will ever have to worry about my limiting speed being something other than the hard drive or flash drive? (Within reason and assuming I keep my stock HDD) At what speeds do people's HDDs start becoming the issue more than the drive? (assuming modern HDDs)

I am really glad that my first foray into USB 3.0 was a 13 dollar flash drive, rather than a larger model.
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a c 748 G Storage
February 7, 2013 2:00:27 AM
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there are some very fast usb3 drives available on the market. kingston had an example of their hyperx predator at one of the recent shows and claimed it did 240mb/s read with 160mb/s write. the thing is like an SSD on a stick! The cheap ones are cheap because they are slow and sometimies they are just old flash mated to a usb3 controller so they still wont work faster than the usb2 speeds they came from.

Storage devices will most certainly be the slowest component of any computer for a long long time to come. If they could be made as fast as the cpu then we wouldn't need ram.
February 18, 2013 3:58:39 AM

Best answer selected by ProfoundGlee.
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