N/file Module in NetSuite: Complete Guide to File Cabinet Operations

The N/file module provides complete control over files in the NetSuite File Cabinet — create, read, write, update, and delete files of any type including CSV, PDF, JSON, XML, and plain text.

Loading an Existing File

define(["N/file", "N/log"], (file, log) => {
  const fileObj = file.load({ id: 1234 });  // Load by internal ID
  const content = fileObj.getContents();
  log.debug("File contents", content);
  return {};
});

Creating a New File

const newFile = file.create({
  name: "output.txt",
  fileType: file.Type.PLAINTEXT,
  contents: "Hello from SuiteScript!",
  folder: 12345  // Folder ID in File Cabinet
});
const fileId = newFile.save();
log.debug("File saved with ID", fileId);

Creating a CSV File

const csv = file.create({
  name: "export.csv",
  fileType: file.Type.CSV,
  contents: "Name,Email,Phone\nJohn,john@test.com,555-1234",
  folder: 12345
});
csv.save();

Key Methods

Method	Description
file.load(options)	Load an existing file by ID or path
file.create(options)	Create a new file in memory
file.delete(options)	Delete a file by ID
fileObj.getContents()	Get file contents as a string
fileObj.save()	Save the file to File Cabinet
fileObj.appendLine(options)	Append a line to the file

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