The Wii U systems offer internal storage for game save data and downloadable software and you can expand the storage memory by connecting an external USB-linked hard disc drive.

We have found that the following external storage devices work with the Wii U system; these device(s) have been subjected to basic performance tests:

Buffalo

1 TB: HD-LB1.0TU3-US

2 TB: HD-LB2.0TU3-US

http://www.buffalotech.com/products/desktop-hard-drives/drivestation/drivestation-axis-2

Seagate

Backup Plus Desktop Drive

1TB : STCA1000100 (US)

2TB : STCA2000100 (US)

http://www.seagate.com/external-hard-drives/desktop-hard-drives/backup-plus-desk/

Expansion Desktop

1TB : STBV1000100 (US)

2TB : STBV2000100 (US)

http://www.seagate.com/external-hard-drives/desktop-hard-drives/expansion-hard-drive/

Toshiba

1 TB: HDWC110XK3J1

2 TB: HDWC120XK3J1

http://us.toshiba.com/computers/storage/desktop/canvio-desk

Western Digital (WD)

My Book™

1TB : WDBACW0010HBK

2TB : WDBACW0020HBK

http://www.wdc.com/en/products/products.aspx?id=870

Many of these devices can be found at these online retailers:

- amazon.com

- bestbuy.com

- frys.com

- sears.com

- walmart.com

We will expand this list as more devices are confirmed to work with Wii U.

• To optimize performance and ensure a consistent experience, all USB storage devices must be formatted and configured for use with the Wii U console. Once a device has been configured for use with a Wii U console, it cannot be used with another Wii U console, PC, or MAC unless it is reformatted. Please be sure to back up any content before formatting the hard drive for Wii U as this content cannot be recovered.
• Please note that we do not guarantee the performance of the devices.
• Specifications of these devices are subject to change, and there is a possibility that these devices may not function properly with the Wii U system due to a specification change.
• Please contact the manufacturer of the USB hard disc drive if there are technical issues or problems with your USB hard disc drive.