If you usually use QQ more, upgrade to the latest version directly, and then install a mobile QQ on your mobile phone and log in with your account. After logging in, log in to the same account with a PC, and you can find "My Device" in the QQ friends panel for file transfer, which is one of the most practical functions of the new version of QQ.

The first folder icon at the bottom is to select a file and send it. The upper right can also manage the transmission records of historical files.

If you don't use QQ at ordinary times, download a PC-side mobile phone management software at will, such as 9 1 mobile assistant, pea pods, Tencent mobile phone housekeeper and so on. Use their wireless connection function to connect your mobile phone and PC. Then use the file management function they provide to copy the files on the computer to the mobile phone!

I hope my answer can help you!