nimbus-eth2/docs/the_nimbus_book/src/database-backup.md

# Back up your database

The best way to do this is to simply copy it over: you'll find it either in `build/data/shared_mainnet_0/db/` (if you're running Prater, `shared_prater_0`) or the directory you supplied to the `--data-dir`  argument when you launched Nimbus).