Xpressengine\Storage\Distributor::allot PHP Method

    public function allot(SymfonyFile $file);

 /**
  * create file
  *
  * @param string        $content  file content
  * @param string        $path     directory for saved
  * @param string        $name     saved name
  * @param string|null   $disk     disk for saved
  * @param string|null   $originId original file id
  * @param UserInterface $user     user instance
  * @return File
  */
 public function create($content, $path, $name, $disk = null, $originId = null, UserInterface $user = null)
 {
     $id = $this->keygen->generate();
     $path = $this->makePath($id, $path);
     $tempFile = $this->tempFiles->create($content);
     $disk = $disk ?: $this->distributor->allot($tempFile);
     $user = $user ?: $this->auth->user();
     if (!$this->files->store($content, $path . '/' . $name, $disk)) {
         throw new WritingFailException();
     }
     $file = $this->createModel();
     $file->id = $id;
     $file->userId = $user->getId();
     $file->disk = $disk;
     $file->path = $path;
     $file->filename = $name;
     $file->clientname = $name;
     $file->mime = $tempFile->getMimeType();
     $file->size = $tempFile->getSize();
     if ($originId !== null) {
         $file->originId = $originId;
     }
     $file->save();
     $tempFile->destroy();
     return $file;
 }