SightLine
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BR Discs can have up to 4 layers with 25GB per layer.
Blu-ray does have a little bit more capacity then dual layer DVDs. How much, I can't remember.
I wouldn't have a problem with the internet download, I just have the problem with the subscription price model. I could store it as a backup on a flash drive and then upload it back on to the computer if I needed to re-install for some reason.
My first digitizing program was that way. Those were they days.
Like I said though, downloads, I wouldn't have a problem from the internet. It's the subscription model that's the issue.