In 'Settings/Users/Access management' enable the right:
'Manage the export and import product files'

Then go to 'Products/Import-export/Export data: products', and generate your product files before downloading them.

You can filter results in the export files generated (ex: to only export last new products):
– go to the 'Products' section,
– click on the 'Advanced search' button at the top of the page,
– select your filter options (ex: in the ID field enter '>45' to sort out all products with an ID greater than 45),
– tick the 'Save results' box,
– and launch the search.
Files generated in 'Products/Export-import/Export data: Products' will only include products sorted out in the search.