Portability: The small hole on the thumbdrive USB is designed for lanyards, which is convenient to carry. Besides, the USB flash drive keychain can also be tied through the small hole to prevent loss. This design is very thoughtful and reflects the humanized design concept of the memorias USB flash drive. Widely Applicable: Compared with other external storage media, take CDs as an example, USB flash disk has obvious advantages in storage capacity, portability, etc., and the sound quality can also reach the level of CDs. Therefore, for modern car audio systems, using disk drives to play music is a better choice. The use of U disk is not limited by network connection, and data transmission and computer storage can be carried out without a network, which is particularly important in emergency situations or unstable network environments.