Do you have two thumb drives of that size? You could temporarily mount one on your user’s “~/Downloads/nvidia/” directory, and the other on “~/nvidia/”. Between the two of those that is by far the bulk of the download content that takes space. There are some logs and configuration in some other directories, but their size is tiny. Just make sure your “~/nvidia” is ext4 filesystem type and not something like VFAT, NTFS, or exFAT.