Downloading mutli-part files can seem burdensome, but split files can be a great option not only for the person downloading the files, but for the server hosting the files. For the downloaders, each file becomes a more manageable size. If your internet speed isn't too fast or something goes wrong with a part, you don't have to download every part again. For the server, larger files can shut down a server if demand is too high. Server load balancing can become expensive, so this is an easy way to makes things more manageable for a site that is on a limited budget.
Fret not, regardless if a file is multi-part or not, it is just as easy to extracting a single file. If you have a file that is compressed then split, you'll need to extract the split files into the compressed file, then extract that file to get the contents inside.
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