Same for me. NAS but in a JBOD configuration. The most difficult files to find online are also on an external backup (external hard drive). So a real backup for those ones. I also use my NAS for live concerts and movies storage, so it's not just JAV. I also have VR files (so it takes like 8-10Gb for one movie). I currently have a bit less than 7Tb of data.
During my tube years, back in 2008 I think, I saw few uncensored scenes of Maria Ozawa, but that was about it. I was watching random videos I found hot on the website, with big US porn names (I didn't care about their names at that time).
It's only in 2012 that I found my first JAV videos by browsing a website where I used to download US porn (I was storing videos of my favorite girls). There was a scene with Yui Hatano : Yui Hatano 波多野結衣 - I Know That Girl ~ Coming Home From Work [MOFOS]. It was around the same time I've got interested in japanese music as well. I decided to download the video and I found her way more natural than US porn actresses. The website only shared uncensored scenes and for few months, I only watched uncensored videos because I thought the censorship was stupid. Huge mistake. There were so much more interesting content and girls, so I ended up watching censored movies and the censorship quickly didn't bother me anymore.