Can i free my iphone storage by moving some files to icloud

Hello Youngkidoijaya,

Absolutely.

These Apple Support Articles will help:

-> What's the difference between device storage and iCloud storage? - Apple Support

-> How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

-> If you have a lot of photos, Optimize your Photo Library: Set up and use iCloud Photos - Apple Support

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You can move some files (Ex:- photos , small video clips, notes etc..) and delete those files from your local storage..iCloud still keeps your files and folders if you want to get files again simply restore your iCloud backup..