Every single photo and video I've ever had from the 80s to the present is on Google Photos.
When it came out years ago, it offered unlimited free storage. At the time, I had all of my digital photos and videos saved on my computer and backed up to an external hard drive. I spent a weekend uploading all of them to the service. Afterwards, I let the Google Photos app on my phone upload the pictures automatically when it charged at night.
A couple of years ago, Google announced they were going to start counting any NEW photos and videos to your Google account storage limit. I went out and bought an Epson photo scanner and scanned hundreds of old photos I had in boxes around the house. It was incredibly fast, so I was able to do about 50 photos a minute. I uploaded all of them before the cutoff.
I still keep my pictures backed up to an external drive in our safe deposit box just in case Google stops the service one day.