Applicable Models

IMPORTANT: This file is only for use with the models identified. Not all models are sold in all countries.

This information is for the following models:

  • NWZ-W274S

About this download

Benefits and improvements

This utility updates the Walkman® player to firmware version 1.01 to resolve an issue where where the Walkman may not startup or playback properly.

System Requirements

Operating Systems

  • Mac OS® X

File Info

File Name

  • NWZ-W274S_V1_01.dmg

File Version

  • 1.01

File Size

  • 17.59 MB

Release Date

  • 04-14-2014

Before You Start


Applicable Models

This firmware update is intended for the NWZ-W274S Walkman® players that have firmware version 1.00 installed. To check the model and firmware version of your player, please follow the steps below.

Note: This update is not necessary if your Walkman player has already been updated by the automatic firmware update function to version 1.01.

  1. Connect the Walkman player to your computer using the supplied USB cradle.
  2. On your computer, navigate to the "WALKMAN" folder.
  3. Locate and open the "information.txt" file to display the Walkman player model name, memory capacity, and the firmware version.

If the version number is 1.01 or higher, this update utility is not necessary.


Important Notes
  • WARNING!!: This firmware update and any changes incurred by it are permanent. It is not possible to return to a previous firmware version after updating this firmware. By continuing this update process and downloading and updating this firmware, you acknowledge that you are aware and understand that this update cannot be reversed.
  • IMPORTANT: It is strongly recommended that you transfer all tracks and data from the player to the computer before performing this update. Tracks and data that remain on the player may be damaged or deleted during the update process.
  • In order to install this update, there must be at least 30 MB of free space on the player.
    Please follow the steps below to check the amount of free space on the player:
    1. Connect the Walkman player to your computer using the supplied USB cradle.
    2. On your computer, navigate to the "WALKMAN" folder.
    3. Locate and open the "information.txt" file to display the Walkman player memory capacity. Ensure that at least 30 MB of free space is available. You may need to delete some songs, unnecessary data, or transfer some data or songs back to the computer to increase free space.
  • During the installation of this file, be sure that you are logged in as the Administrator or as a user with Administrative rights.
  • To ensure that no other program interferes with the installation, save all work and close all other programs.
  • It is highly recommended that you print out these instructions for use as a reference during the installation process.

Download & Install


Computer System Requirements

  • Operating systems: Mac OS® X v10.6 or later
  • CPU: 1 GHz or higher
  • Memory (RAM): 32-bit (1 GB or more) 64-bit (2 GB or more)

Download and Installation Instructions

  1. It is strongly recommended that you transfer all tracks and data from the player to the computer before performing this update. Tracks and data that remain on the player may be damaged or deleted during the update process.
  2. To ensure that no other program interferes with the installation on the computer, save all work and close all other programs before proceeding.
  3. Click "Download Now" to begin the download process.
  4. Read the Software Download License Agreement and, if you agree, click "Accept Agreement".
  5. Download the NWZ-W274S_V1_01.dmg file to a temporary or download directory (please note this directory for reference).
  6. Connect your Walkman player to your computer using the supplied USB cradle.
  7. Go to the directory where the file was downloaded and double-click the NWZ-W274S_V1_01.dmg file to begin the installation.
  8. Carefully follow the on-screen prompts to complete the installation.

    IMPORTANT: Do not disconnect the player from the computer while the update is in progress.

    Note: During the update process the USB connection is automatically controlled and the "Connecting" indication is off. The USB disconnect message may be displayed on the computer. This is normal.
  9. When the update complete message is displayed, click the "Finish" button.
  10. Once the update is complete, you may disconnect the Walkman player from the USB cradle.
Confirm Successful Update (optional)
  1. Connect the Walkman player to your computer using the supplied USB cradle.
  2. On your computer, navigate to the "WALKMAN" folder.
  3. Locate and open the "information.txt" file.
  4. If the version number is 1.01, the update is successfully installed.

Questions & Answers


Possible Error During Update

ERROR: The update data file cannot be transferred because there is not enough available space in the device. RESOLUTION: Click "Finish" and retry the update procedure.
Note: Ensure that at least 30 MB of free space is available on the Walkman player. You may need to delete some songs, unnecessary data, or transfer some data or songs back to the computer to increase free space.