I like having tools in my home, don't get me wrong, but storage being free is an illusion. I still think the cost to be worth it.
You're spending mental power indexing all the things you have. I assume you pay for your dwelling, dollars-per-sqft is a thing to consider.
Doing the Amazon route (which is exactly what I do) means I know I have every cables I could ever need within 24 hours. And I don't have to remember where I last put it, and I don't have to deal with knotted cables, and I don't have to wonder when a thing doesn't work, is it the cable?
I'd say Amazon is not necessarily a guarantee of that.
Instant access to useful items is valuable. Think of it like... caching for tools. I like having items I need within reach. I'd love a bag like Hermione's in Harry Potter.
Waiting 24h is a lot if you're in flow and you want that thing _now_ dammit!
Even then, it's most likely even more expensive, because if it's just an off-the-shelf HDMI cable, you'd probably have one around. Look for the cheapest SCSI cable, if you don't think so.
I don't want to say 'store everything', but just backordering stuff is much more expensive in my experience.
Video game output cables are already hard to find for cheap.
The bins sit neatly on a shelf and I know exactly where to find any type of cable I need. The cable wraps prevent them from turning into giant tangled messes.
Not zip ties.
I'm not the person you're asking.
The diameter of the circle depends on the cable length and thickness. 2m USB cable should be 10cm, 3m power cord should be 20cm, and 10m Ethernet cable should be 30cm.
[1] https://www.walmart.ca/en/ip/8-x-1-2-Black-and-Gray-Cable-Ti...
I actually tested all my microUSB cables and found out majority of them had trouble delivering over 1A of power through them -> bin.
For the rarer ones I kept one of each (usb-a->usb-b, mini-usb etc), the ones that were the best quality.