I still have over 900 paperbacks. Over 20Y of Analog Magazines.
OTOH Only my first few PC's had Hard drives that could not hold my Library.
My current biggest single hard drive is 2T ( I have 5 working PC on my network and a small NAS I use to back up to)
My LP rips take more space than my Library.
Why keep so many on the device? I have about a years worth of TBR on my Kobo. It only takes moments to change that. (I do mark Done in Calibre and remove the books from the device, once that has been done)
My problem is 99cent (or any under $4) boxed sets of the type I read. I am glad bytes are not heavy