Importing data into ONA
To bulk import you need to select the option Upload dataset
Ona supports different files and here's a simple guide to prepare the file before uploading link
Exporting data from ONA
To import data in ONA first you need to create a data export, this is an interesting way to import data, because ONA keep track of all the data export created and people from the same team can use the same file avoiding mistakes or differences when creating the file.
ONA offers many options, in this project we are used to use default settings as you can see in the image below.