No more unlimited storage for Google Photos

As an iPhone user that doesn’t like to pay an additional sum for cloud storage, Google Photos has been a lifesaver for me. I currently have pictures in my Google Photos app backed all the way up from 2011. But Google Photo’s unlimited storage just ended on June 1st and now I’m contemplating other options. Here are a few ideas I’ve gathered to combat this change:
-Remove unnecessary files and large files from Google Drive and Gmail to free up space
-Export data and back it up! (What do you use to back up files/pics/etc?)
-Choose an alternative service- any suggestions? Anybody use Dropbox? Flickr? ImageShack? Let me know!