1) Device not detected
2) You need to update your device to use Mi PC Suite
3) Can't connect to your device.
In this post, let's see the problems with Mi PC Suite and the status of this issue. And also I have included a link at the end of this post regarding some free PC Suite software that you can use to manage your Android Phone. For this particular post, the system details of the Mi Phone, computer and Mi PC Suite are as follows.