Galaxy S4's LCD broken. How do I access hidden folders in the storage using computer?
As you're able to access your device (i.e. apply input to it), the easiest option would be activating usb-debugging and then use adb. There are even good graphical remote-tools when it comes to ADB (if the device is rooted, and your computer is running Windows, I strongly recommend taking a look at Droid Explorer; its dev is an active member here at this site), but you can as well deal with the command line (ls -a would include hidden folders and files in a listing of the directory you're in).

For additional hints, please take a look at our tag-wikis for broken-screen and adb, plus at my list of ADB tools – the latter including pointers to several "ADB file-managers" which might prove helpful in your case.