D70 does not go into PC mode

Try the following link:
http://support.nikonusa.com/app/answers.. <<

Hi!
if you want use the 4G you make sure your memory cards is compatible to 4G. then now you have got stuck when you back the 512!? all you have to do is to reformat your camera in to software. Thanks!!!

You could try formatting in on PC by right clicking the card's icon in My Computer to bring up the options, then format it on the camera as well

Have you tried using the wireless mode? Even if there is a problem with the hot shoe interface, it might still work using the wireless mode. To do this you have to set both the camera and the flash. On the D70, under the menu with the icon that looks like a pencil, select Flash Mode|Commander Mode|TTL|OK. On the flash, hold down the Zoom and [-] buttons to get the CSM menu. When you see the zigzag arrow, push the Mode button to turn on the wireless mode.You may have to use the [+] or [-] buttons to cycle through the menu to find the zigzag arrow.

Now you should be able to use the flash detached from the camera. Just pop up the D70 flash, which will tell the SB-600 what to do via light pulses. There are other settings that may be required (channel and group settings must match between camera and flash) and be careful not to block the light sensor on the side of the SB-600. If the wireless system is still working, you may find you like it better than hot shoe operation.

The D70 has known issues with certain cards / capacities. Nikon has identified the cards and capacities that are guaranteed to work with the D70 specifically, on their page dedicated to this info linked below:

http://support.nikontech.com/app/answers/detail/a_id/9601

It seems that only Lexar and Microdrive cards that are 4Gb are supported (some with significant limitations) and no card greater than 4Gb is supported at all, regardless of manufacturer.

it will be cheaper for you to buy a card reader. My camera would not let me download photos into iphoto.. try to see if you can just drag photos into your computer.. If that is the case change your photo program.

This is easily solved.
Most probably the camera's USB connection mode is set to PTP. This is useful for certain situations such as controlling the camera from the computer (you even take photos from OS X's built in Image Transfer).
Change this to "Mass Storage" in the camera settings menu and your camera will behave just like a card reader. Next time you connect it to the computer, plug it it, then turn it on and it will appear on the desktop and in the sidebar as an attached drive.
Don't forget to eject it before disconnecting just as you would an ordinary external drive.

Like most I have searched the web for drivers, preferably free ones. I emailed JVC Australia who responded with tis solution.

The camera has a connection called DV. The DV connection is used with a cable called Firewire.
Firewire is a driver less cable and will allow you to stream you video footage across from the camera to your PC.

USB is used for data transfer and need drivers, you would use this mainly to transfer still images or data files off a HDD camera.
If you use firewire and the DV connection you will stream the footage across to the PC and the PC will capture the footage as it is playing.

The firewire is about $15 and can be purchase from stores such as **** Smith, Bing Lee, Harvey Normans and Tandy. I would suggest that you take a photo of the connections on your PC as there are two types of DV connections. (4pin - 6pin)

You can connect the camera to the computer via a USB cable and use the camera as the card reader. It will show up as a mass storage device. You should then be able to copy the images to your PC and format the card once recovered.

You have to go into Nikon Transfer, click on Transfer Options (wrench & screwdriver), click on Transfer tab, check Embed ICC. It says it will only work when camera mode is set to II (Adobe RGB).