Apple music vs iCloud storage, how does switching Family plans work?

DarkLotusRen wrote:

Will adding someone to Apple Music remove them from their iCloud storage plan?

You can't just add people to Apple Music, it's not how it works, what you can do, is invite them to your Family Sharing Group, and share your active subhscriptions with them, one of which can be Apple Music.

click here ➜ Family Sharing - Apple

and here ➜ How to set up Family Sharing on your iPhone, iPad, or Mac - Apple Support

I pay for a family plan for specifically Apple Music and I'd like to give my mom one of the slots.

Aplpe Music doesn't on its own have any slots for other people. You need to set up Family Sharing and invite someone to it. Family sharing is what has the spaces for other people to join and make use of active subscriptions. The "slots" aren't specific to one subscription butare part of the Famnily Sharing Group.

She currently doesn't have an Apple Music subscription but she does have iCloud storage through my dad's storage subscription. Will joining my family plan kick her off my dad's storage plan?

If she's already part of your dad's Family Sharing group where she shares in his iCloud subscription then she cannot join your Family sharing group to access Apple music.

She can choose to leave your Dad's Family Sharing group and will lose access to whatever your dad is sharing.

click here ➜ How to leave or remove a member from a Family Sharing group - Apple Support

If you also have an icloud subscription yourself you can share it with her too once she joins your Family Sharing Group.

click here ➜ Add a member to a Family Sharing group on iPhone - Apple Support

She cannot be part of 2 Family Sharing groups at the same time.

Thanks, I know what a Family Sharing plan is and how to add people to it, I've done it for my partner and kid. I know you can't be in multiple at once. I was confirming that Family Sharing affects both Music and iCloud simultaneously, as I had suspected, and she will lose her storage when she switches to my plan. More importantly we would like to confirm if any files she has saved in iCloud will be deleted or made unavailable when she leaves his plan. We need to know how much backing up of her many gigabytes of photos and other data will be required.