Many people use one USB drive for everything: office documents, client files, photos, personal scans, installers, backups, and files they need to hand to someone else. The problem is that normal folders are easy to browse, copy, or open when the drive is shared or lost.
Folders like Work, Personal, Share, and Archive help reduce mistakes. But folder names alone do not protect anything if someone else opens the drive.
If you often hand the USB drive to coworkers, clients, students, or a repair desk, do not keep sensitive files in the same visible area as the files meant for sharing.
Password-protected ZIP or 7z archives can help with a few files, but they become annoying when work documents change every day.
GiliSoft USB Encryption fits this mixed-use USB drive problem. Keep normal shareable files in the public area and move work-private or personal-private files into a password-protected secure area.