Upgrade SSD - MacBook Pro 2017 with.T.

Hello !

I have a 13" MacBook Pro 2017 with Touch Bar (Juni 2017) with 256 GB SSD.

It is great, but I want to have an upgrade from 256 GB SSD to 512 GB oder 1 TB.

Questions:

- Is it possible to bring the Macbook to the apple store. Then the SSD will be changed within 1 day ?

- Who is upgrading otherwise ?

Because I need my macbook for work I would make an Time Capsule Backup in the Morning, the bring in the Macbook for SSD change and later the day, Restore the backup from TC to the Macbook.

I live in southern Germany.

Thanks !

Andreas