SanDisk Ultra Dual Drive Go (128 GB) for $29: This handy drive swivels to give you USB-C or USB-A, and comes in various sizes and some fun colors, but the lower capacity drives are slow (USB 3.1). How to Eject and Format Drives AccordionItemContainerButton LargeChevron It's a good idea to format your USB flash drive before you start using it. How to Get the Most From Your USB Flash Drive AccordionItemContainerButton LargeChevron There are a few things to keep in mind when you’re shopping for USB flash drives, and we also have some tips for using them.