Hi cellis52,
You may want to look into iCloud+ with Family Sharing.
"Share an iCloud+ subscription
You can share iCloud+ with members of your Family Sharing group. Family Sharing members get access to additional iCloud storage as well as iCloud Private Relay (beta), Hide My Email, and HomeKit Secure Video support. See What is iCloud+? and Upgrade to iCloud+ and manage your subscription.
Do any of the following:
- On your iPhone, iPad, or iPod touch: Go to Settings > [your name] > Family Sharing. Tap iCloud Storage, then follow the onscreen instructions.
- On your Mac: Choose Apple menu
> System Preferences, then click Family Sharing. Click iCloud Storage, click Share, then follow the onscreen instructions.
Note: Not all iCloud+ features are available in all countries or regions. iCloud Private Relay and Hide My Email require an iPhone, iPad, or iPod touch with iOS 15, iPadOS 15, or later. For more information, see the Apple Support article System requirements for iCloud."
You can find this information here: Use iCloud with your family
Your files are linked to your iCloud account email address. When using Family Sharing you'll need to be sure each member has their own address. The article here can also help: Share iCloud+ with your family
You can cancel your current iCloud subscription with the steps here: Downgrade or cancel your iCloud+ plan - Apple Support
Best.