If you are starting to get familiar with D365FO one thing you might do is import and export data which would be part of your setup process or if you have it running you just need to get some data out to use in another system.
There are the export to Excel processes but if you are doing a large import or export you will want to use the data management tools. There are a few concepts to get familiar with. For example how to run an export.
Here is a quick overview.
D365FO 1611 – Update3 (7.0.4307.16141)