USB accessories refer to external storage devices used to store and transfer data. They are connected to a computer, laptop or tablet via the USB port. USB accessories are divided into several types, the most common of which are flash drives and external hard drives. Flash drives are portable and easier to carry around. They are small in size but have high storage capacity and come in various sizes and shapes. As for external hard drives, they are larger in size and have more storage capacity than flash drives. They are also relatively cheaper. Another type of USB accessory is the memory card reader, which is used to read and write data from various memory cards. It is extremely useful for photographers who shoot with digital cameras as it allows them to quickly transfer all the photos onto their computers. Lastly, there are USB hubs which are used to connect multiple USB accessories simultaneously. This is especially useful for power users who need to work with multiple USB devices. To sum up, USB accessories are essential for connecting USB devices to computers and laptops. The range of USB accessories has grown over the years, so choosing the right one for your needs is a must.