I have a Nikon D1x camera I use a USB Compact flash card reader to plug it into my computer (I don't have the camera USB) I open up "Computer" and click "Removable disk (F:" and it shows me a file names "DCII" When I try and open it, it says Location not available F:/DCII is not accessible The file or directory is corrupted and unreadable. First time this happened I thought it was my CF card, so I got a new one and that didn't work. So I got the adapter and it worked the first time but now it doesn't work anymore. I'm stumped. I was wondering if I Can at least get my pictures back.

SOURCE: "Disk is unreadable" message when inserting a CF Card - Macintosh OS 9.x

Certain system software is needed to allow a Macintosh (running Macintosh OS 9.x or earlier) to access mounted compact flash cards. If this required software is not installed the computer will not be able to recognize the card and will display the following error: DO NOT press the "Initialize" button, as this will completely erase the card and destroy all images. Click the "Eject" button and then enable the necessary system software. The following Extensions or Control Panels need to be activated: File Exchange - Control Panel Foreign File Access - Extension The "Extensions Manager" Control Panel (found under the "Apple" menu) can be used to enable these items. After switching them "On" restart the computer to apply the changes. After restarting the computer insert the card and it will mount on the desktop like any removable disk.

SOURCE: "Disk is unreadable" message when inserting a CF Card - Macintosh OS 9.x

Certain system software is needed to allow a Macintosh (running Macintosh OS 9.x or earlier) to access mounted compact flash cards. If this required software is not installed the computer will not be able to recognize the card and will display the following error: DO NOT press the "Initialize" button, as this will completely erase the card and destroy all images. Click the "Eject" button and then enable the necessary system software. The following Extensions or Control Panels need to be activated: File Exchange - Control Panel Foreign File Access - Extension The "Extensions Manager" Control Panel (found under the "Apple" menu) can be used to enable these items. After switching them "On" restart the computer to apply the changes. After restarting the computer insert the card and it will mount on the desktop like any removable disk.

DASEP

• 96 Answers
• Posted on Jul 08, 2008

SOURCE: My Nikon Coolpix 2100 Lexar starter memory card has become unreadable

It sounds like your Dazzle is not compatible with the sandisk. Maybe the Sandisk CF UltraII card have a new update software in it.

Artgirlny

SOURCE: Nikon 4300 CF Card Erro

The Nikon Coolpix 4300 only supports the FAT16 filesystem, so it can only support a 2GB partition. To support 4GB you need a FAT32 filesystem.
Put the card in a CF writer and attached to a PC or Mac. Partition 2x2GB partitions, then format them as FAT16. Now put it into the Coolpix 4300 and it should work.

SOURCE: CF light stays on, cards come out unreadable by computer

You may need to have your camera driver and software reinstalled. It seems that the internal writer capabilities are corrupted.

This is evident if each card you use ends up corrupted or unreadable, but the rest of the camera operates normal.