The Backups tab shows what the platform holds for your account and lets you restore from it.
Two habits worth having anyway:
- Before a big change - upgrading your site's software, editing its configuration - download a copy of the files and export the database. Five minutes now beats an evening later.
- After finishing a migration in, take one backup so the earliest good state of the new home is on record.
Restores overwrite what is currently there. If you are unsure, open a ticket first and say what you need back - support can see what exists for your account.