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Very slow USB Copying speed

post #1 of 8
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Hi there, I have a Kingston Data Traveler 111 16GB Flash drive, but when I tried to copy some large files into the drive, it starts pretty fine at around 40MB/s and stays at that speed. But lately when I tried to do the same, it started at around 40MB/s, and dropped to 8MB/s, and occasionally the transfer speed goes to 0 bytes/sec in Windows 8 x64. Any ideas? mad.gif
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post #2 of 8
The write speed on those drives is notoriously low, around the figure you have quoted is about par for the course.

A lot of transfers will lie to you until you reach the very end, then it will look like the transfer is hanging. It is actually catching back up, and did not transfer at that rate. That is why sometimes you will see the last 1% taking a lot longer than expected.
post #3 of 8
Thread Starter 
Quote:
Originally Posted by beers View Post

The write speed on those drives is notoriously low, around the figure you have quoted is about par for the course.

A lot of transfers will lie to you until you reach the very end, then it will look like the transfer is hanging. It is actually catching back up, and did not transfer at that rate. That is why sometimes you will see the last 1% taking a lot longer than expected.
Thanks. But the trouble is when I used a Sandisk Cruzer Blade and copied the exact same file, it is around 3.5MB/s...

EDIT: It seems like it's about right... That drive is pretty slow on write speeds... tongue.gif
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post #4 of 8
Quote:
Originally Posted by sooyong94 View Post

Thanks. But the trouble is when I used a Sandisk Cruzer Blade and copied the exact same file, it is around 3.5MB/s...

http://gadgetcat.wordpress.com/2010/03/12/flash-review-sandisk-cruzer-blade/

If you look at that the transfer rates are even lower on that drive.

It sounds just like you are using drives with low write speed capabilities.
post #5 of 8
Have you tried freshly formating the drive?
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post #6 of 8
Quote:
Originally Posted by sooyong94 View Post

Hi there, I have a Kingston Data Traveler 111 16GB Flash drive, but when I tried to copy some large files into the drive, it starts pretty fine at around 40MB/s and stays at that speed. But lately when I tried to do the same, it started at around 40MB/s, and dropped to 8MB/s, and occasionally the transfer speed goes to 0 bytes/sec in Windows 8 x64. Any ideas? mad.gif

From Amazon reviews, looks like write speed of the drive is just around 5-10MB/s. Guessing some form of caching was at play when you got 40MB/s write speeds. *sigh* Flash drives like this should not be allowed to use the USB 3.0 logo. rolleyes.gif

If you want a faster drive, Tom's Hardware did a round-up of 31 USB 3.0 flash drives. The SanDisk Extreme comes highly recommend. It's kinda pricey but it's pretty good value for the money.
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post #7 of 8
I once reformatted my flash drive...and it went from 40 MB/S to 400 KB/S. I tried reformatting it to different formats but it still stayed at around 300-400 KB/S. Dead flash drive frown.gif
post #8 of 8
Quote:
Originally Posted by Bluescreendeath View Post

I once reformatted my flash drive...and it went from 40 MB/S to 400 KB/S. I tried reformatting it to different formats but it still stayed at around 300-400 KB/S. Dead flash drive frown.gif

If you did a full format instead of a quick format, that explains your problem. You've just put your entire flash drive in a dirty state which means it does a read-erase-program of entire blocks instead of just programming free pages.
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