微软 Windows Insider Program 给之前在 Dev Channel，现在在 Canary Channel 的用户发了一封标题为 Introducing the Canary Channel 的邮件，底部有可以申请免费 USB 安装盘、用于重装回退其他通道的优惠券，原文如下
To perform a clean installation of Windows, we recommend using a blank USB flash drive with at least 8GB of storage. If you don’t have one, request a USB by using this code: XXXXXXXXXX. Limited supply, items are available on a first-come, first-served basis.
To perform a clean installation of Windows, we recommend using a blank USB flash drive with at least 8GB of storage. If you don’t have one, request a USB by using this code: XXXXXXXXXX. Limited supply, items are available on a first-come, first-served basis.
