1. Open WeChat, click "I" in the lower right corner, and then click "Favorite".

2. Click "+"in the upper right corner, and then click "File".

3. Select the file you want to send from your mobile phone.

4. Enter the chat interface of the person you want to send the file to, click "+"in the lower right corner and select "My Collection". Select the file you want to send.

5. Click "Send" to send the file to the other party successfully.