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USB flas drives


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11 replies to this topic

#1 Elise

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Posted 10 March 2009 - 02:53 AM

Hello, I have a few questions about USB mass-storage devices.
First of all, should I format them FAT or FAT 32, whats the difference for an USB device? Does it have consequences for performance/speed?
Second, when I try to copy larger files (yesterday already with an mp3-file from 30 MB), I sometimes get the message, error, could not copy the file *.*. I understand there will be problems when I try to copy an image file of 700 MB, better burn it, but it happens also with much smaller files (files are not corrupted). What causes this problem (usb devices are all good, scanned surfaces etc, no problems, virus free).

I try to gain a little insight, so any help would be appreciated!


O sorry, for the type-error in the title of this topic, don't know how to change it.

Edited by elise025, 10 March 2009 - 02:55 AM.

regards, Elise


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#2 dc3

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Posted 10 March 2009 - 03:56 AM

A flash drive should come preformatted, and they are formatted in FAT32, this format has a maximum file size of 4GB.

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#3 Elise

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Posted 10 March 2009 - 04:03 AM

Well thats no problem, I have max. 2 GB. But most of them came formatted FAT and not FAT 32. What difference does it make (I know the difference between the two, but would I remark a difference when using them?)?

regards, Elise


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#4 Justa

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Posted 10 March 2009 - 04:25 AM

Hi Elise,
FAT is really FAT 16 and is an older file format. FAT 32 is newer and uses smaller cluster sizes (less wasted space) and will support drive over 2GB but is not usable with DOS.

FAT 32 vs FAT32 (Scroll Down For Everything)
http://technet.microsoft.com/en-us/library/cc940351.aspx

#5 dc3

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Posted 10 March 2009 - 04:29 AM

Actually most flash drives come formatted in FAT32, there were some formatted in FAT16, and even a very few in FAT12, but none were just FAT. I don't think that you notice any difference in performance between either of these.

Wikipedia has a good article on FAT systems.

Edited by dc3, 10 March 2009 - 04:31 AM.

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#6 Elise

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Posted 10 March 2009 - 04:38 AM

Thanx! This clarified some tings for me.
I have one small usb stick from 128 mb, do I understand it right that this cannot be formatted FAT 32?
As for the errors. The memory card from my mp4-player was formatted FAT(16 I think) and the errors occured with long file names. If I rename them, should it work better (or reformat them fat32, but cannot do that now).

regards, Elise


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#7 Justa

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Posted 10 March 2009 - 04:50 AM

That's right Elise. FAT 16 does not support long file names. I remember what a pain this was when transitioning to FAT 32 and then trying to use long file names on a FAT 16 drive. I remember file names being chopped off automatically and losing key parts of the file description. Shorting the file names should certainly resolve the problem with FAT 16.

512 Mb is the minimum for FAT 32

Edited by Justa, 10 March 2009 - 04:53 AM.


#8 Elise

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Posted 10 March 2009 - 04:53 AM

Well, this gets weirder. I just checked all my usb storage devices. The thing is, my small usb-stick (128 MB) is formatted fat32 (I red the article from microsoft technet and understood that fat 32 is not possible under 256 mb).
My mp4-player and camera memory cards (1 GB and 2 GB) are both FAT. When I can transfer the data on it, I will format them FAT32 and see what happens. I buyed both last year, so strange that they were formatted FAT.

regards, Elise


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#9 dc3

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Posted 10 March 2009 - 05:12 AM

That's not true, there is no minimum size limit.

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#10 Justa

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Posted 10 March 2009 - 05:12 AM

Interesting
Good sources on FAT 32 differ. What the heck at this point the try it and see approach might be the simplest answer.

#11 Justa

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Posted 10 March 2009 - 05:14 AM

Thanks DC,
I must have posted a few secs after your post.

#12 Elise

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Posted 10 March 2009 - 05:23 AM

Justa and dc3, thanks. So far it works fine, I just format everything FAT32. Until now (I tested) no problems.

regards, Elise


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