Check out example codes for "ASP.NET MVC Two file upload, different destinations". It will help you in understanding the concepts better.

Code Example 1

<input type="file" multiple="multiple" name="files[0]" id="files_1" />
<input type="file" multiple="multiple" name="files[1]" id="files_2" />
<input type="file" multiple="multiple" name="files[2]" id="files_3" />
<input type="file" multiple="multiple" name="files[3]" id="files_4" />

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