Custom Chunk Size
Set a custom chunk size with chunkSize. This example uses 2 MB chunks instead of the default 5 MB, which can be useful for slower connections.
Chunk size: 2 MB
new MultipleUpload(document.getElementById('demo-chunk-size'), {
uploadUrl: '/api/upload',
multiple: true,
chunked: true,
chunkSize: 2 * 1024 * 1024 // 2 MB
});