I found Google opinions absolutely useless. I had a few when they first launched many years ago, but don't think i've had any since.
but may look into Amazon AWS (S1, S2 whatever)
You're almost there - S3. Although it'll only work out cheaper if you're storing Terabytes of data. Anything upto about 1Tb will work out cheaper on other platforms, S3 wasn't really designed for storing small data sets. You could move it into glacier/cold storage, but you'd pay an absolute fortune to retrieve it. Well, it's not stupidly expensive, but if you had to retrieve it, it'll work out more expensive than paying for something like Google Drive or Dropbox etc overall.
I might need to pay, I'd use Amazon but the google interface and the photos app is too good. Face reckognition, map browse, and auto fix photos etc is amazing.
I'm tempted to upload my photos to Google Photos, let it do it's thing, and then download them and stick them elsewhere.
Was coming for a while.
Can't say I'm happy about Google Music being closed down and replaced by Youtube Music (absolute garbage!) though. I transferred my library to Youtube Music but the app is awful. So many clicks to get through to your library, terrible scroll speed through songlist and just terrible layout. Google Music was so slick, neat and tidy in comparison.
Was in the midst of downloading my entire library again, unfortunately it's a bit **** at doing that. You can do a mass library download, but it then just dumps every track into a single folder, with some weird naming convention, so i've had to download each album individually.