We did this. Blu-ray prices are higher per GB than hard drives but I “feel” like they’ll fail less.
You can use Roxio burning software which makes DATA discs and spans multiple discs. It will label them “disc 1, disc 2, etc.” It’s really efficient. We archive on blu-ray disc with a simple word document.
We write on the discs using sharpies “Project name and number XXX, Date, subject” we also write this on the folders too.