if i cancel my icloud plan were will all my data and backups will be ?

reine177 Said:

"if i cancel my icloud plan were will all my data and backups will be ?"

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Loss of Backups when Cancelling iCloud + Plan"

Yes. You only have 5GB of free storage, without an iCloud + Plan. So, backup to a computer, prior to this. Note that you can only restore your iPhone from a backup that is of the same iOS version. Downgrading is not an option, unless beta iOS is installed --you'd have to set this up anew for that.

Properly Downgrading iCloud:

1. Download All of iCloud, First:

Prior to downgrading, download all of iCloud. That way you do not lose any data, once downgrading.. Use my user tip: Getting a Quick and Direct "iCloud Drive-to-External Hard Drive" Download - User Tip

then...

2. Downgrade your iCloud Plan:

If you want to get less storage in iCloud, downgrading your iCloud plan is the way to go. Note that this has a monthly fee. Here is the link to user: iCloud+ Plans and Pricing - Apple Support. Note that this service is not available in all countries/regions.