Diane,
As I said in my earlier reply it's most likely a High Density card. On 
the card somewhere in small print it will say "HD". You need a card 
reader that will support HD cards. Most of the newer ones do....
-Pete



Diane wrote:
> The card is trying to be used in an HP computer.  It's 4GB and the highest
> it's read is 2GB.  I checked their web site and there might be a limit.  It
> works on my newer computer with Vista.  It wasn't seen when I plugged in the
> mp3 player with the card inside.  So I need to get a usb card reader.  Will
> any do?
>
> Diane
>
> On Thu, Jan 22, 2009 at 8:35 AM, Hachmeyer, Mr. Paul S. <[log in to unmask]
>   
>> wrote:
>>     
>
>   
>> Be careful if you decide to format the card.  If the card is for camera
>> use, only delete files and format it in the camera.  I have a couple cards
>> that were formatted in a pc that will not work in a camera because the
>> format is different.  They can sometimes  be fixed with a hex editor, but it
>> is a pain.  Have you tried it in a camera?
>> Paul Hachmeyer
>> ________________________________________
>> From: Personal Computer Hardware discussion List [
>> [log in to unmask]] On Behalf Of Diane [[log in to unmask]]
>> Sent: Friday, January 16, 2009 6:21 PM
>> To: [log in to unmask]
>> Subject: [PCBUILD] MIcro Card
>>
>> Dear Listers,
>>
>> I just bought a new Sandisk 4GB micro card on Ebay.  I get an error message
>> when I put it in my card reader:
>>
>> "L :\is not accessible.  The request could not be performed because of an
>> I/O device error."
>>
>> I thought maybe it needs to be formatted.  But I've never had to format a
>> micro card before.
>>
>> Running XP2
>>
>> Diane Kroeckel
>>
>>
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>>
>>     
>
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