Link it once and Shot List re-reads it on its own — there's nothing to upload again. Nothing leaves this machine, and your ticked-off shots are never overwritten.
Open the sheet, click any cell, ⌘A then ⌘C, and paste below. Nothing to download and no sign-in involved — this works straight from the open spreadsheet.
Paste a SharePoint Copy link exactly as you’re given it. The link has to be shared as “Anyone with the link” — one shared only with named people, or with your organisation, needs a Microsoft sign-in that can’t be answered here. An Embed link, a published HTML page, or a direct .xlsx/.csv URL also work.
Each sale keeps its own lots, its own column matching and its own progress.
Detail and lifestyle shots come from the Y columns in your sheet. Any single watch can still be overridden on its own screen.
Your data lives in this browser only — take a backup now and then.