Icloud back up

Hi GillesDed,
Thanks for using the Apple Support Communities. If you are are looking to back up your iPhone, you can either do it through iTunes on your computer, or through iCloud. If you don't have enough space in iCloud for the backup (either remaining, or in general), you may need to either clear up some space or upgrade your storage plan. For all of these scenarios, you may find the following articles helpful:
How to back up your iPhone, iPad, and iPod touch - Apple Support
Manage your iCloud storage - Apple Support
Buy more iCloud storage - Apple Support
Regards.

Hi

You can buy more storage on iCloud £0.79 per month for 50G

What storeage do you have on iPhone? I6G/32/64

Cheers

Brian 🇬-1F1E7;