Ensure that you have MongoDB installed and running on your local machine or server. Also, make sure Node.js is installed, as you'll need it to write a script for the data transfer. Verify both installations by running `mongo --version` and `node --version` in your terminal or command prompt.

Create a JSON file containing the data you wish to move to MongoDB. This file should be properly formatted, with an array of JSON objects if you're inserting multiple documents. Save it with a `.json` extension, for example, `data.json`.

Open a terminal and create a new directory for your project. Navigate into this directory and run `npm init -y` to initialize a new Node.js project. This command will create a `package.json` file, which will manage your project's dependencies.

Inside your project directory, run the following command to install the MongoDB Node.js driver: `npm install mongodb`. This package will allow your Node.js script to interact with your MongoDB database.

Create a new JavaScript file, e.g., `importData.js`, in your project directory. In this file, write a script to read the JSON file and insert its contents into the MongoDB database. Here is a basic template to get you started:
```javascript
const fs = require('fs');
const { MongoClient } = require('mongodb');
async function importData() {
const uri = 'mongodb://localhost:27017'; // Replace with your MongoDB URI if different
const client = new MongoClient(uri);
try {
await client.connect();
const database = client.db('yourDatabase'); // Replace 'yourDatabase' with your database name
const collection = database.collection('yourCollection'); // Replace 'yourCollection' with your collection name
// Read JSON file
const data = JSON.parse(fs.readFileSync('data.json', 'utf-8'));
// Insert data into MongoDB
const result = await collection.insertMany(data);
console.log(`${result.insertedCount} documents were inserted.`);
} finally {
await client.close();
}
}
importData().catch(console.error);
```

Execute your Node.js script to move the data from the JSON file to MongoDB. Use the terminal to navigate to your project directory and run the command `node importData.js`. Monitor the console output to verify that the data insertion was successful.

Open your MongoDB client (such as MongoDB Compass or the mongo shell) and connect to your database. Check the specified collection to ensure that the data from your JSON file has been inserted correctly. You can use a simple query like `db.yourCollection.find()` to list all documents in the collection and verify their presence.