How to transfer my vault from an account owned by my former partner to my own 1Password account?

Hi everyone,

I'm hoping to get some guidance on migrating my data to my own account.

Currently, all of my passwords and items are stored in a vault under a 1Password account that is owned by my former partner (it's their family/shared account, and I'm a member). For obvious reasons, I'd like to move everything over to a brand new 1Password account that I own and control myself.

A few questions:

1. Is it possible to transfer or export my vault(s) from their account into my own new individual account?
2. What's the recommended way to do this — is there a direct vault transfer option, or do I need to export my items to a file and re-import them?
3. Are there any items that won't transfer cleanly (attachments, passkeys, document items, etc.) that I should watch out for?
4. Once everything is moved, what should I do to make sure my data is fully removed from the old account?

I still have access to the items right now, so I'd like to handle this before anything changes with my membership on their account.

Thanks in advance for any help!