DiscFit is described as 'Arranges a big set of files or directories in order to use the minimum number of physical media (CD, DVD, BD...) pieces. You can drag the resulting sets directly over your burning software (Nero, DVD-go' and is an app in the file management category. There are three alternatives to DiscFit for Windows. The best DiscFit alternative is Ignition, which is free. Other great apps like DiscFit are SizeMe and Burn to the Brim.
Ignition is a CD/DVD burning optimizer. It helps you saving space on your media by optimizing the way files are placed on the CDs/DVDs of your set. For example if your backup fits on 3-4 CDs, a manual files organization might lead on a 4th with only 10 Mb of data when a better...
Maximize your output! SizeMe makes it possible to scan a directory and compare it to how many floppy/zip/CD-R/DVD-discs you need. (Many calls it spanning or span of elements over a medium). It tries to fill each disc up as much as possible, and gives you the result on each disc. .
Burn to the Brim is an open-source freeware program designed to make selection of files to optimally fill up an entire CD (or other medium).
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