I do not see any good free alternatives to Google Photos now that Flickr will be gone.
Paid alternatives are Microsoft One Drive, Apple iCloud, Dropbox, Google Drive, etc.
Flickr Pro is actually not too bad at US$4.17 per month for the annual plan.
Apple iCloud: Singapore (SGD) per month
50GB: S$ 1.28
200GB: S$ 3.98 (Family sharing)
2TB: S$ 12.98 (Family sharing)
Google Drive
100 GB 2.79 SGD / month
200 GB 3.99 SGD / month
2 TB 13.99 SGD / month
https://onedrive.live.com/about/en-sg/plans/
Microsoft OneDrive Storagebonly plan
50GB: S$3 per month
Microsoft 1TB One Drive with Office 365 Personal:S$108 per year or S$10.80 per month
Microsoft 1TB One Drive with Office 365 Home S$148 per year or S$14.80 per month (family sharing up to 5 people, 1TB x5)