How to transfer data from iphone to cloud?

To transfer data to iCloud:- Connect to Wi-Fi.- Settings > Apple ID > iCloud.- Toggle on what to sync (Photos, Contacts).- For full backup: iCloud Backup > Back Up Now.If storage full, buy more. Great for switching devices. Video: https://www.youtube.com/watch?v=AcckZH-PCqQ

Simple: Go to Settings > [Your Name] > iCloud > iCloud Backup > Back Up Now. Ensure Wi-Fi. It uploads photos, apps, etc. For details: https://support.apple.com/en-us/108344