Portable drives are dirt cheap nowadays. I'd buy one. Really, that's all you need: your data will be both on your main hard drive, and on your portable. And you won't be burning disc after disc.

Of course, you only need to back up what you're afraid of losing.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3