combining two iCloud storage accounts

Hello,

I have two iCloud storages with two separate Account ID (Emails) I would like to combing these. Recently, I bought a new Mac Book Pro and created a new APPLE ID for it, but can not access my old storage account which I STILL PAY FOR.

I would like to combine these two storages which will give me more than enough space for my things. Please advise if there is a safe way to accomplish this.

Thank you