@Konrad Kawka : The Data Explorer is not available in the Community Edition of Databricks. However, you can still access the FileStore using the Databricks CLI or the Databricks API.
databricks fs ls dbfs:/FileStore/
To access the FileStore using the Databricks API, you can use the dbutils.fs.ls() command in a Databricks notebook or script
dbutils.fs.ls("dbfs:/FileStore/")