You can export image fields only by custom export field selector. You can edit and upload the fields back into StoreAutomator.
Here are the steps:
1- Select the products and go to Export>Custom…
2- Select the fields from the Images section.
3- Download the file from the “Notifications” from the top right.
These are the fields in the file.
IMPORTANT NOTE: If you want to delete a specific field data, you must leave the cells as empty. This action will delete the data which you have already in SA, when you upload the file back into SA.
IMPORTANT NOTE: When you are entering your data into the image fields, please fill the empty cells within the order. (First image_url_ 1, then image_url_2) Otherwise, you are most likely to get an error when you upload the file into SA.
4- After the changes, upload the file back into SA.