Or you could leave it like it is and just change the default file permissions for the given device. You cannot change file permissions on vfat on a file by file basis because the filesystem is incapable of storing this information, but you can specify the file permissions Linux sets for the entire device to be rwx in your /etc/fstab.
To do this, add "umask=000" in /etc/fstab as a mount option. This specifies the default permissions for all files on the given filesystem; a umask value of 000 would mean you have octal permissions of 777 for everything on the drive.
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