Older USB 2.0 flash sticks would chug along at under 20MB/sec which could make backing up a lot of 4K video take hours. The performance of USB storage devices can vary wildly. Apple Macs are available only with Type-C, and you'll need a dongle or alternative cable to use older USB devices.
Most drives still use the traditional USB Type-A connector, but you'll also see the smaller, rounded USB Type-C. The best USB flash drive for you will depend on your needs. For creatives, USB storage is a straightforward way to keep important project files backed up, to carry a portfolio for demonstration or to house a sizeable amount of the media you like to enjoy while on the move.