What to do if the USB cable can detect the Xiaomi 14T but does not allow access to its contents?

If the USB cable can detect the Xiaomi 14T but does not allow access to its contents, here are some steps you can follow to troubleshoot the issue:
1. Enter [Settings] >> [About phone] >> tap [OS version] 7 times to enable [Developer options], then go to [Additional settings] >> [Developer options] >> [Default USB configuration] >> check if [No data transfer] is selected;
2. Please use the official data cable first;
3. Please change the other USB port of the device to connect the data cable;
4. Reboot the two devices;
5. Check for system updates. Make sure your Xiaomi 14T is running the latest version.