Singular? I have a laptop and have been laptop-only for years now (no room for an actual PC), but still... I don't know how I'd manage with just one. Even in the laptops that aren't really intended to have more I would take out the ODD and replace it with a HDD (and then proceed to fill that to the brim over time, because that's just how it goes). Luckily I didn't even have to do that this time (not that I have any use for the ODD here, but it is less of a pain this way). So, disks:
C: 500 GB SSD, a system drive that's actually mostly free since I tend to stick to the "system drives are for nuking in case everything breaks and I need to do a clean reinstall, so nothing I'd miss is to be there" philosophy
D: 2 TB HDD. It's my data / long term storage drive, for documents and large files and such, so being 5600 rpm Seagate nonsense is good enough. This one's about half full.
E: 1 TB SSD, mostly meant for installed games, 85% taken up, half of that just Steam games that I will totally get around to playing one day and don't want to have to download when I do
Bonus: last year I worked to improve my LAN architecture, so now there's a NAS (actually an external HDD connected to a Raspberry Pi 4B) on it. Everything at home which possibly can gets to mount it (and I've ensured everything is connected by proper fast lanes, none of that 100 Mbps "fast ethernet" nonsense here), which includes my laptop as its Z: drive. So that's 8 TB of storage space, 25% filled up already with all sorts of nonsense. It being there really helped me with managing my D: drive, too - otherwise it would definitely be full right now.>>1019534>that disk arrangement
How'd you manage to fill up your C so much though? Mine's still at 330+ GB free, and I'm pretty sure the major contributing factor to it filling up nowadays is just that I have my generic download folder on it which I plan on cleaning sometime.