update with append() method and ajax request

Question

UPDATE Slowly by slowly i progress, so i change my mind for use append() method. My ajax request is ok :

      var arrImg = new FormData();
  for (var i = 0; i < nbFiles; i++) {
    var actualName = $(fromInput)[0].files[i].name;
    if(actualName != valueToDelete){
      imgValue = document.getElementById('image_1').files[i];
      arrImg.append("image[]", imgValue);
    }
  }
  arrImg.append('action','delete_tof');
  arrImg.entries();
  // console.log(arrImg)
  my_url = ajaxurl;
  $.ajax({
    url:my_url,
    data :arrImg,
    contentType: false,
    processData: false,
    method: 'POST',
    success : function(data){ 
      console.log(data);
    },
    error : function( data ) {
        console.log(data)
        alert('Une erreure s\'produite, au moment d\'effacer votre image');
        // location.reload();
    }
  }) 

result of the consol.log(data) The result of ajax request is ok

Then my function php

function delete_tof(){
// Count total files
$countfiles = count($_FILES['image']['name']);

// Upload directory
$upload_location = '/tmp/';

// To store uploaded files path
$files_arr = array();

// Loop all files
for($index = 0;$index < $countfiles;$index++){

   // File name
   $filename = $_FILES['image']['name'][$index];

   // Get extension
   $ext = pathinfo($filename, PATHINFO_EXTENSION);

   // Valid image extension
   $valid_ext = array("png","jpeg","jpg");

   // Check extension
   if(in_array($ext, $valid_ext)){

     // File path
     $path = $upload_location.$filename;

     // Upload file
     if(move_uploaded_file($_FILES['image']['tmp_name'][$index],$path)){
        $files_arr[] = $path;
     }
   }

}
echo json_encode($files_arr);
wp_die(); 

}

And the the vardump of $_FILES and $files_arr is ok

the vardump of $_FILES in function is ok

But i don't understand why, when i submit my original form i still have the wrong number of files ?

Next the first attempt but Filelist is not updatable so i left this try

i'm trying to update Filelist in javascript i create array of datas image like that

  var arrImg = [];
  for (var i = 0; i < nbFiles; i++) {
      imgValue = $(fromInput)[0].files[i];
      arrImg.push(imgValue);
  }

With this loop i have what i need for update FileList.

My array of datas

The probleme after is for update Filelist.

I've found that :

Function for update list

But I can't adapt it to my problem. I've trying different stuff like

arrImg.push(new File(imgValue)); //In the loop 

then

$(fromInput).arrImg = FileListItem(arrImg)

But no success because an argument is missing

Maybe there is another way with file() method but that doesn't work as well

$(fromInput).file(['File'],arrImg[1])