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"MaxFileUploadPackages" which sets the maximum number of chunks packages the file will be sent in. Below the value is 4.
With the configuration below, a 1 Mb file would be sent in two chunks packages of 500 Kb each.
If you send a file exceeding the size limit, you will get this error message:
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If none of the settings exists in the web.config file, "MaxFileUploadPackageSize" defaults to 2147483647 and "MaxFileUploadPackages" the size of packages defaults to 100000.