dvd image file copy

I don't know much about dvd image file copy to put together a good question about it or search for it on the Web.

Here is the situation. I am copying some of the files in my computer to dvd.

It works fine except for large files, for example, with 6 GB. Currently, I am forced to break down the original file as Part1 and Part2 to copy them separately.

I know very little about image file format. Apparently, using this method I probably could copy the entire 6 GB file into one DVD.

If so, how can I do this? Could you explain a bit about this format as to what it is and what purpose it is generally used? Is it for executable files or any general files could be stored on it?

Thank you.
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Mike EghtebasDatabase and Application DeveloperAsked:
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you can not burn 6gb to one DVD
you will have to split the files in two parts
or if your burner can burn blu-ray then burn it on a blu-ray disk which has more capacity
Mike EghtebasDatabase and Application DeveloperAuthor Commented:
Blue ray is not an option at this point.
☠ MASQ ☠Commented:
A single sided DVD has a capacity of around 4.7GB - if you want to store more than this on the media you're going to need to compress it first using something like WinZip, WinRAR or 7zip, how much you can compress it will depend on the type of files you are trying to reduce in size.  Data files are pretty easy to shrink, media like mp3 or most video formats less so.  Compressed files will need to be uncompressed before they can be used.

Dual layer (DL) DVD (around 8.5GB) and BluRay discs (about 25GB) have greater capacity but the media is more expensive and compatibility between units is not as universal.

So yes you can put 6GB on a DVD if it's DL and your drive supports it or on a conventional 4.7GB disc if you want to compress it.
Mike EghtebasDatabase and Application DeveloperAuthor Commented:
Thanks for the good info. What is iso (format??, image burning) if I am phrasing correctly.
☠ MASQ ☠Commented:
.iso (from the International Standards Organisation) is a file which contains an image of a disk - either CD or DVD.  Increasingly they are used to enable downloads of software which can then be "rebuilt" into the original disk structure - so Microsoft for example use it as a means of customers being able to download a DVD of Windows when they've purchased it online.  .iso images can also contain areas with specific functions - so for example you can create a disk that can be used to boot from, then that disk can be converted to an .iso image and then used to create other bootable disks.  

It's worth understanding also that the size of an image file does not necessarily reflect the amount of data contained on the disk once created as the .iso contains other data about the format of the disk as well as the data.

A common mistake with users id they will try to create a disk from an .iso image by burning the .iso image to the drive as data - all this does is produce a disk with a .iso file on it.  What is needed is software that interprets the image file and then creates the formatted disk.

File compression software can also read .iso formats so software like WinRAR and 7zip will open .iso files and allow you to view their contents (but not create bootable disks).  You can also get utilities than will "mount" .iso images on your computer and let them behaves as if they are separate physical disks

See also http://en.wikipedia.org/wiki/ISO_image

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