Heya,
You could simply take your BluRay and make an IMAGE of it (the *.ISO format) so that it can then be mounted on a virtual drive and used as if a disc were inserted into the system. You can do that and remove protection and clutter and just keep the content you want in a digital source file, and image file, not just a bunch of files. The only issue is that BluRay content can be pretty huge, so many gigs per disc. You would need several terabytes of storage to hang on to a bunch of BluRay titles. For example, my 1tb drive is currently holding about 160ish DVD's in ISO format (ripped as an image of the disc). They range from 5~7gigs each. BluRay titles can be 20~50gigs each. So granted, you can still hold quite a few (so much cheaper than buying a BluRay burner and media to burn to!) on HDD's, you could on average hold about 18 BluRay titles on a single 1tb drive (assuming they're 50gigs each, so clearly, you could hold more as not all of them are 50gigs). I'd say you could probably shoot for about 25 BluRays per terabyte or so. Again, just an estimate. If you consider that, for a $100 drive to hold them, and zero money for the burner/media, all you need is a drive capable of reading BluRay (to rip from) and those are relatively cheap. Overall, it's cheaper to do this than to buy bluray media for burning/copying.
The bluray burning drive will run $200ish (though getting a GOOD one is imperative, so expect more like $250 or more). From there, you would need dual-layer BluRay discs in order to take full advantage of what you're doing. Those run over $100+ for even a few right now. It's not very cost effective to copy BluRays to BluRay media. That's a huge start up cost and still expensive to maintain it. Where as you could get a $70~$100 BluRay reader and a $100 1tb HDD and have zero cost for media. Just buy another HDD every two dozen BluRays or so. It's still expensive (storage is slower to catch up to BluRay's storage capacity), but ultimately perhaps more useful.
Cheers,