> For the complete documentation index, see [llms.txt](https://docs.3dolphins.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.3dolphins.ai/faq-user/data-settings/what-needs-to-be-backup.md).

# What needs to be backup?

You should always to back up: 

1. Solr 
2. MySQL.