$3.99/mo for unlimited storage. I back up my iPhone pics/videos to it also (in a private folder). The UI is very intuitive and friendly and the mobile app makes uploading pics in the field painless.
From their FAQ:
"We want you to be able to share and archive each and every photo. From cute cat photos to epic globetrotting landscapes, we want them all—not just your ten best. So if you have 1,000 or 1,000,000 (or more), we double-dog dare you to upload everything you’ve got
My stuff: https://dougreeves.smugmug.com/browse