Some problems and its solutions

Look here: https://www.youtube.com/watch?v=V6m5ZPGIbcI firstly we must unmount flase drive for that: sudo umount /dev/sdb* (*unmount all partitions of drive) sudo cfdisk /dev/sdb sudo mkfs.vfat -n 'yourlabel' /dev/sdb1 in details , please look the video

Read these articles: https://medium.com/@dtkatz/3-ways-to-fix-the-cors-error-and-how-access-control-allow-origin-works-d97d55946d9 https://github.com/Rob--W/cors-anywhere/#documentation