If you want to copy a large number of audio and video files, you have to get a USB flash drive of 16G or more. Actually, it's up to you. It is generally cheaper to buy it online, but you should go to a reputable website to buy it.

Brief introduction of USB flash drive

U disk is the abbreviation of USB (universal serial bus) disk, which is also called "USB flash drive" according to homophonic. U disk is a kind of flash memory, so it is sometimes called flash disk. The biggest difference between U disk and hard disk is that it does not need a physical drive, plug and play, storage capacity far exceeds that of floppy disk, and it is very convenient to carry.

Reference to the above content: Baidu Encyclopedia -U disk