Apologies if this has already been discussed, but I've just figured this out. (first time posting, so be gentle)
I have been spending a lot on Google One storage, tried out the hack to get 30TB for free, which was reversed. I've now come back to an alternate solution… using my Pixel2.
Back in the day, it was guaranteed that the Pixel 2 would get unlimited storage if you used the "Storage saver quality" for your photos and videos… So, I've been transferring all of my current photos (2 TB) to my Pixel2 and it has been backing them up to my account without impacting my storage quota.
Here's the theory: Purchase a pixel2 for as cheap as possible… this means you get unlimited storage… forever!
I am testing this theory out… bought a pixel2 off ebay for $146.85 with a discount of $22.03, total $124.82.
https://www.ebay.com.au/itm/166348860222
If this works, it means you get unlimited photo storage forever for $124… not bad, eh?
Yeah, it'll work. This is a well known "hack".
People use Syncthing app to automatically make the transfer happen.