You could check out Wise Folder Hider.
I have a couple of folders with my personal information Social Security, Medical Records, etc. hidden using it. I've used it for years.
Once the app is installed, you just open it and tell it to hide the folders.
They visually disappear from your computer.
To get them back you open the App, put in a password and the app opens letting you unhide the folders.
You can minimize the app, but if you close the App, the folder will disappear again.
I don't put the App in view on the task bar or start menu either, I have to type a code in the start menu search to get it to show up. It's kind of overkill, more of a game than anything, but it does make it easy for me to get my SS info, etc. without having to remember where I put them.
I'm 83, I have to access this stuff a lot.
I have the folder in an easy-to-access location, but they don't exist without the app.
Wise Folder Hider Free is the best freeware to hide folders and files. Protect your private data or important files from prying eyes with double password protection.