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Topic # 60449 26-Apr-2010 15:10
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How fast should files transfer on USB 2.0?

When i plug in my Flip HD, the file transfer rate stays around 4.5 MB/second. This seems quite slow to me... shouldn't it be going faster than this? I know the Flip HD camcorder is usb 2.0 compatible...


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  Reply # 323075 26-Apr-2010 15:13
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Just looked it up.

USB 2.0 should run at 480 Mbps which equals to 60 MBps.

http://www.everythingusb.com/usb2/faq.htm#4 )

Why is mine going to slow???

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  Reply # 323142 26-Apr-2010 17:52
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Is it directly connected to the usb port, no extension cable.
My slowest USB keys reads at 7MB/s so you should be getting better.

 
 
 
 


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  Reply # 323155 26-Apr-2010 18:25
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Plugging into my front USB seem to run slower than the rear "on board" ports. Try the rear ports if you havent already.




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  Reply # 323308 26-Apr-2010 23:56
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I suspect the read/write speed of the storage medium in the Flip HD will be the limiting factor at play here.

Most flash based storage is not very speedy (apart from the stuff used in modern SSD hard drives).



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  Reply # 323327 27-Apr-2010 01:07
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Tried plugging into the back USB ports, no difference in speed.

No difference in speed with read or write.

What could be causing this? Any ideas???

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  Reply # 323335 27-Apr-2010 01:49
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the more files, the slower it goes.
max if FAT32 on my system is 10MBps.
max if i reformat usb key to NTFS can go up to 70MBps.



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  Reply # 323461 27-Apr-2010 10:57
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Interesting... i'll try formatting a usb stick when i'm home and see what happens :)

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  Reply # 323968 28-Apr-2010 01:55
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Performance of flash memory varies by quality of the flash and the controller.

Basically cheap (and nasty) USB flash memory devices have poor read/write (especially write) performance.

See here
http://usbspeed.nirsoft.net/usb_drive_speed_summary.html
http://usbspeed.nirsoft.net/




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  Reply # 324005 28-Apr-2010 08:33
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I wouldn't have thought the Flip HD would be bad quality though? Interestingly, when I plugged a cheapo MP3 player into my front USBs the other day, a message popped up saying transfer would be faster on USB 2.0, which I thought they were. Maybe it was a mistake, or maybe only the back ports are (as someone else already pointed out).

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