it means that some items inside are Hidden or Read only and some not. A blank checkbox indicates that none of the items have that attribute, whereas a checkmark indicates that that file or all the ...
If you want your hidden files to be visible all the time, then you'll need to use a few Terminal commands. First open up Terminal, which can be found in Applications under Utilities. Then ...
Once it appears in the result, right-click and open the file location. Windows allows you to set a file or folder hidden from the default view. You may have set the missing file or folder as ...