More to the point (not our fapping habits) how many of each week's new releases you feel you want to collect?
I also open more than 1 vid each time I use my collection. But no matter what I can't possibly make use of them all, if I download more than 3 vids per week, on average. Of course there are good weeks and bad weeks. But after so many years of collecting watching and fapping, I know I'm already collecting more than I can fap to. So why get any more than that? The way LIFE is, more time I spend on collecting porn is less time for things I need and want to do, that's including sex (both solo and non-solo).
While we're off topic, you certainly have a point. I actually download a lot and more than necessary, and for sure there are some videos in my collection I will never fap on, or even I will never see, as well as videos I completely forget to have or folders I will probably never re-open until the next year.
Excluding some themes and some studios, if I like the actress I tend to download most of her works, and I often archive videos in the relevant actress' folder after they are downloaded without not even seeing them. I started seriously collecting JAV a couple of years ago, and I have actually about 8 TB archived. There are actresses I care more, and others I stop updating after a few titles because I realize I don't really care. I have some actresses folders which because of the video quality and/or number of releases are very large (eg Ai Mukai or Ayumi Shinoda are probably close to 100 GB each).
Until a few years ago, I used to burn DVDs and it was a nightmare as well as very space/time demanding, I even used to think about the utility of each video and review if it was so necessary, plus extra issues like making their sizes fit a DVD... and possibly the DVD got eventually lost. But since when I use external HD I'm in paradise, they are so easy to organize, cheap and fast, and up to a point you don't have to care too much about sizes and quantity limits. Very likely when the archiving will become too much exacting, or my three HD will be almost full, I will change download attitudes, but so far I did not felt the need to review which video is "necessary" or which one is superfluous, especially as I know I changed so many tastes during the years, got tired and got re-interested in something/someone, disliked a video during the first review and liked a lot when I have reseen it, that now tend to be more conservative. And tubes are disrupting file sharing, so if you want re-download something one year later you found nothing, so for most titles it's "now or never".