async filesExist({ deviceType, fileList, storageId }) {
    checkIf(deviceType, 'string');
    checkIf(fileList, 'array');

    const result = await this.repository.filesExist({
      deviceType,
      fileList,
      storageId,
    });

    this._sentEvent({ result, deviceType, eventKey: 'FILES_EXIST' });

    return result;
  }
description - Check if files exist

@param {string} deviceType
@param {[string]} fileList
@param {string} storageId
@return {Promise<boolean>}