How do you store all your product manuals?

[tomparker]

Until now, I've been using a classic 3-ring binder to store all the user manuals of my electronic products in one place, but this takes space and frankly isn't that easy to use when you are looking for a specific document. I've been looking at some paperless alternatives.

I started using Evernote (No Advertising), it's really useful to storage all the documentation. However, it's not specifically for products and tends to end up a bit messy. I've recently tried Unioncy (No Advertising) that automatically creates a catalog of your products from the information in your receipts, backs up a copy of the original one, stores the users manual of the product and also tracks each product warranty.

How do you currently store your product manuals? Have you ever tried one of these paperless systems? Do you know any other paperless alternative?

Thanks!