There have been changes to the Samsung Cloud. Samsung cloud used to provide 15GB of free storage. Gallery data is now can be backed up to OneDrive and the default (free) limit is 5 GB. In OneDrive you can see the storage left for your account. Basic Samsung services can be backed up unlimited to Samsung cloud.
Hope this helps.
Hi @sarasphotobox, as @Neo001 has correctly pointed out, you have 15GB of free storage through Samsung Cloud. You'll be able to see your available storage by heading to the Samsung Cloud website: https://support.samsungcloud.com/