Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a 30 GB zip file containing an archive of digital materials available in the school library that I want to burn to DVD. Of course, 30 Gb is far too large for a single DVD and the content is already zipped. I'm open to ideas, but leaning towards suggestions that will help me automatically spread the file over multiple DVDs, including a simple program to stitch it back together again later.

share|improve this question
up vote 7 down vote accepted

The easiest solution is probably to just split the file, then re-concatenate it before unpacking.

There are many file splitting programs available. On Linux/Unix, split -b will work fine; on Windows, see e.g. .

That said, this has the disadvantage that you need to get all the DVDs and re-concatenate the file on disk before you can read anything. Maybe another approach is better?

Options would be:

  • put everything on a portable harddrive
  • create a multi-volume zip archive
  • zip parts of the data individually to create multiple smaller zip files
share|improve this answer
I like the portable hard drive idea. We have a small number of those lying around I could put in an enclosure and then put away somewhere safe. Probably last longer, too. I could even pre-unzip the files. – Joel Coehoorn Mar 24 '10 at 17:09

7-Zip on Windows supports spanning. Simply select "4480M - DVD" from the "Split to volumes, bytes" dropdown in the "Add to Archive" window.

share|improve this answer

You want Disc Spanning,

I haven't used this since my 3.5" disk days but it is still valid. The wiki article has links to a freeware and an open source program that will span DVDs.

share|improve this answer

hi write your dvd with the program toast titanium pro v 10 , the toast program when selecting the type of dvd in toast program , select that kind you have (for example dvd 5 4.7 GB) , the toast automaticlly split your file for some dvd , after burning you use your dvds , automatically a program run and ask you to save your file or files on hard disk , after reading first dvd ask you for others. that kind of writing works in windows and mac . it's perfect , no matter your file is zip or others files .

share|improve this answer

Just to add to @sleske's reply, I'd copy the 30Gb file to more than one hard drive and store in different places, just in case one gets trashed.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .