Create an online file and image library

My apologies for posting this here as I know I’m in the wrong place but I’ve been trying all day to find a forum for my question.

I’m trying to find an existing system online to store files and images for customers to download. Something which doesn’t involve them having to log in or sign up to anything. So it would essentially be a website that they could visit which would then have a home page containing folders which they can click on then download the files contained within these folders. I would be the person responsible for uploading and updating files stored on the website so it would need to be user friendly as I’m not much of a coder myself. I know that I could get something like this custom built but I though surely there would already be some kind of platform out there that we could pay for and use.

I quite like the look of this one, though I understand this has probably been custom built: http://www.theheinekencompany.com/media/image-gallery

If anyone can suggest something that would be great.