How do I prevent files from being deleted from others?

Hi, one useful recommendation is to make all this files invisible, for this you will need to use terminal.

Here are the instructions:

Launch Terminal from /Applications/Utilities/ and use the following command syntax:

chflags nohidden /path/to/hide/file.txt

If you know the path to the file just type it yourself. If you don’t, follow the drag & drop methodto automatically type the entire path within the Terminal, just be sure to drop it in after the initial command, and then hit the return key:

chflags hidden [DRAG FILE HERE]

This will hide your folders or files.

For showing those files do:

At any point you can unhide the file with the following chflags command:

chflags nohidden /path/to/hide/file.txt

This means that after you stop using the computer enter those commands on terminal and hide them. The user after you won't be able to see them (unless he knows how to unhide files, but for that case he would have to be specifically looking for your files). And when you return just type the command to unhide them.

If there are many files try to gather them all on a folder and hiding that folder, which automatically will hide all its content

Have you tried creating a folder, and removing permissions from everyone but yourself for accessing the files within it?

Create new folder and then CTL+Click on the folder, then on the "Get Info" tab, unlock it and change the permissions.

Cheers,

GB