Influxdb storage folder [windows]

In the default configurations for Windows, the data is stored in the directory c:\Users\<username>\.influxdb\data\.

EDIT: I couldn't change that from the config file, but setting INFLUXDB_DATA_DIR environment variable can do the trick.

Update influxdb.conf file with the location you want.

Open cmd

Cd to the path

Run influxd.exe -config influxdb.conf

If you are running InfluxDB as a Windows Service and that service is running as the local system account, you will find the .influxdb\data directory here by default:

C:\Windows\System32\config\systemprofile\.influxdb\data 

Note: Answer below is for macOS/Linux and was provided before the [windows] tag was added.

In the Data section of the Influx documentation, it is stated:

dir = '/var/lib/influxdb/data'
The directory where InfluxDB stores the data. This directory may be changed.
Note: The default directory for OS X installations is /Users/<username>/.influxdb/data

It is safe to say that this directory contains the base persisted file storage of the database.

As mentioned in the docs, the default data storage directory can be overriden by changing theINFLUXDB_DATA_DIR environment variable.

Specifically for Windows you will probably find the data path in the influxdb.conf file.

However, this directory does not include the meta data for the Influx instance, like users, databases, retention policies etc., nor stuff like the WAL (write-ahead-log), cache, logs and others. If you're interested in this, the earlier mentioned docs provide insight into this as well.