It’s no problem chopping spreadsheets up into manageable chunks at least initially. Problems may occur though when trying to process updates from suppliers. I have over 300 of those and one gave me an update spreadsheet with over 250,000 rows. Naturally I won’t be trying to chop that up :-). I’ve really got to be able to automate that but i’ll test out howe it might wotk later. ISTR trying out WPAI but giving up on it. I’ll have another go.