Thank you for your support of Xiaomi products. Bluetooth file transfers can fail due to high levels of wireless interference in the surrounding environment. Interference from multiple Bluetooth devices, Wi-Fi networks, or other electronic signals can disrupt the connection, leading to unsuccessful transfers. To improve transfer stability, it is recommended to move to a location with less signal interference and try the transfer again. Additionally, ensuring that both devices have Bluetooth enabled, are within an optimal range, and have sufficient storage space can help enhance the success rate of the file transfer. If the issue persists, restarting Bluetooth on both devices or re-establishing the pairing connection can resolve the problem.