Sometimes a USB drive needs to do two jobs at once: carry files you want to share and keep personal or business files private. The risky part is that normal folders on a USB drive are easy to browse when someone else plugs it in.
Hidden folders are easy to reveal in File Explorer. This is only a light organization trick, not real protection for confidential files.
A vague folder name may stop casual attention, but it does not stop someone from opening the folder and checking the files.
ZIP or 7z passwords can help, especially for a few files. The downside is that you need to update the archive whenever the files change.
One public drive and one private drive can work, but it is easy to carry the wrong one or forget which copy has the latest files.
GiliSoft USB Encryption is built for this exact split. Keep shareable files in the normal public area, and place private files inside a password-protected secure area on the same USB device.