All good and free things must come to an end. And that also goes for the ability of Pixel users to upload “original quality” photos and videos to their Google Photos app. For the US users, the access will end by 2020. Meanwhile, we get an extra two weeks or so as the free option will be taken off the table on January 15, 2021. It hasn’t been explicitly said if all uploads done before the end date will remain available to users but at this point we assume that it will. To continue to upload new images and videos in their original state past the deadline, it seems you’ll have to start paying as you would for extra storage on, let’s say, Google Drive. If you switch back to the “high quality” setting though, you’ll continue to have free storage for your Pixel.
Source: Android Authority