The end of free unlimited storage on Google Photos is imminent. Starting June 1, 2021, users who want to continue using the service will have to check out once their free storage allowance is full.
Moving your photos out of Google even if it is forced, can only be an excellent idea anyway.
Exporting Google photos
before opting for a third-party service, you might want to think about exporting the photos stored in Google Photos.
You can export them easily on this page: https://takeout.google.com/
Storing Google photos
Several options are possible to store your photos; NAS and cloud apps permit to manage efficiently your pictures album. Both also automatically upload photos from your mobile.
Storing photos on your NAS
Storing photos on other clouds
Some clouds like pCloud offer a lifetime subscription and a pretty handy app to manage your pictures.