Copying large files to USB drive

January 11, 2008 at 09:43:46
Specs: Win2K, x86 Stepping 10 / 256MB
I am trying to copy large files (25GB to 180GB) to an external USB drive. It seems that I can copy 2GB files fairly easy. What is the limitation of copying larger files to an USB NTFS harddrive?
Thanks, Keith

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January 11, 2008 at 09:58:43
NTFS? The file limit is the same as with NTFS HDD's. In practical terms, the file size will be limited by the size of the drive. However, it sounds like your USB is formatted to FAT-16.

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January 11, 2008 at 10:19:09
Well, it says it is NTFS. I just started a 27G file copy to it about 5min. ago. I will see how it is coming along in around 2hrs. It is USB 1 so I will try to be patient and see what happens.


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January 11, 2008 at 16:32:15
USB 1 is extremely slow. Is this transfer a one time thing or will you need to repeat? If you need to do this again I suggest you upgrade to USB2.0.

You say you have files that range in size between 25/180GB. Do you mean folders? Or are individual files that large? If they are that large you could reformat the drive using larger cluster sizing to speed things up.

Give some additional computer specs including the service pack installed on Win2000.

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January 11, 2008 at 23:15:46
... ya the fat32 limit @ 4GB files

... usb2@480kb/s

... usb@11kb/s

... ok ya

wat do I know?
... got brain freeze

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January 12, 2008 at 04:59:34

USB supports three data rates:

A Low Speed (1.1, 2.0) rate of 1.5 Mbit/s (187 kB/s) that is mostly used for Human Interface Devices (HID) such as keyboards, mice, and joysticks.

A Full Speed (1.1, 2.0) rate of 12 Mbit/s (1.5 MB/s). Full Speed was the fastest rate before the USB 2.0 specification and many devices fall back to Full Speed. Full Speed devices divide the USB bandwidth between them in a first-come first-served basis and it is not uncommon to run out of bandwidth with several isochronous devices. All USB Hubs support Full Speed.

A Hi-Speed (2.0) rate of 480 Mbit/s (60 MB/s).

Experimental data rate:

A Super-Speed (3.0) rate of 4.8 Gbit/s (600 MB/s). The USB 3.0 specification will be released by Intel and its partners in mid 2008 according to early reports from CNET news. According to Intel, bus speeds will be 10 times faster than USB 2.0 due to the inclusion of a fiber optic link that works with traditional copper connectors. Products using the 3.0 specification are likely to arrive in 2009 or 2010.
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