The contentPatch folder can have an empty download folder within it. That's okay. BUT you need to have a contentpatch.package file that is 7,976 in size (or close to that). When it first installs, it has separate files up to 07 (I think). They are what go into the DL folder. But, once installed, they aren't needed again.
If you have 40 dccache .ebc files, then you have a lot! I think I have 26, but I don't own everything and I don't install cc through my launcher (unless it's by mistake with a lot). You also probably have installed sims and lots into this folder. I keep mine free of DLs and place DLs into a copy.