Question Used space on burned DVD is much greater than size of file ?

[john21521]

Hi everyone

I burned a 25 MB file onto a DVD using Windows Explorer (Windows 10).
It is the only file on that DVD, but the DVD shows that almost 190 MB of space is used up ?

Any idea why?

 

[Math Geek]

I am assuming you are using a multi session burning method here.

Each session is finalized which creates a buffer to separate this session from the next. That takes space otherwise used for data.

It shows as space used even though technically the data size is smaller.

Your much better off waiting until you can fill the disk completely before burning it

 

[john21521]

I burned the DVD using the same method as shown in chapter 3 of this Video

However in the video after burning 3 files with a total size of 4.5 MB the used up space on the DVD is less than 10 MB

If that is the session taking the space up why is it taking 165 MB on my burned DVD but so much less on the one in the video even though I used the same burning method?

 

[MagicSakura]

Is your DVD disc a DVD-RW? I would suggest using USB flash drive mode so you can use a UDF based file system, which is the mode I currently use for burning discs.

 

[MagicSakura]

It is very common that the space used by the disc is larger than the file size, sometimes due to burning errors that cause repeated writing losses, usually the burnable space should be smaller than the nominal size of the disc to avoid burning failures.

 

[john21521]

I used a DVD-R

What seems very odd to me is that the used up space on my DVD is almost 8x the size of the file.

I found another video where somebody burns 7.5 MB to a CD with this method and the space used up is 31MB, so roughly 4 times the file size ?

 

[MagicSakura]

This is because you are not using USB flash drive mode and when you burn video it will be re-encoded to MPEG-2 format.

You can copy out the files in it and see if the video encoding has changed.

 

[john21521]

I burned an exe-file, not video