First of all, the mobile phone should support the OTG function, and only the mobile phone that supports the OTG function can support the external USB flash drive.

if it's an ordinary USB flash drive, you need to buy an OTG cable, so you can connect the mobile phone with the USB flash drive. If it is a dual-purpose USB flash drive, insert the small data header directly into the mobile phone.

find the song you want to download on the phone webpage, and then click download. In the setting options of mobile phone, change the saving option to external USB storage, and you can do it. If it is a song saved to the mobile phone, you can press and copy the song icon, then find the USB storage device, open it and paste it in.

u disk:

U disk, full name is USB flash drive, English name is "USB flash disk". It is a miniature high-capacity mobile storage product that uses USB interface and does not need a physical drive. It is connected with a computer through USB interface to realize plug-and-play function. ?

the name of USB flash drive originated from a new storage device produced by Netac Technology, called USB flash drive, which uses USB interface to connect. After connecting to the USB interface of the computer, the data on the U disk can be exchanged with the computer. However, the equipment with similar technology produced later can no longer be called "USB flash drive" because Netac has registered its patent, but is renamed as "USB flash drive" with homophonic sound.

Later, the name U disk was widely known for its simplicity and easy to remember. There are many USB flash drives supporting multiple ports on the market, that is, three-way USB flash drives (USB computer port, iOS Apple interface, Android interface).