Export the My products / Product Options file:
If you haven't added any product options yet the file will just have headers in Row 1.
There are 3 required fields as follows. All the fields require special attention as they link to other sections.
Product Identifier (required)
User defined unique identifier for the Product. This field needs to be the same as the Product Identifier defined in the Product section.
Option Identifier (Required)
User defined unique identifier for the Option. This field needs to be the same as Option Identifier defined in Option export sheet.
Option value identifiers (Required)
User defined unique identifier for the Option value. This field needs to be the same as the Option value Identifier defined in the Option value export sheet.
Once you've added all your details, save as a CSV and import the file by going to import:
Clicking on My products opens up a side panel. Select Product Options from the Select data dropdown list, select the csv file to be imported then press the blue import button.
The import process will only complete if the file has no errors. If the file has errors an error log (in CSV format) will download to your download folder. Open this to see any errors flagged with a description of the error. Fix the errors and re-import.