Yes @janny108 , @Steven9761 is correct and I would say it is advisable to use Microsoft One Drive. However it is not the only Back up option. On July 1 all photos and files will be deleted from Samsung Cloud. See more detail herehttps://www.techradar.com/uk/news/samsung-cloud-is-closing-down-so-migrate-your-photos-and-files-now
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.