A creator active in UGC often handles several brands in parallel, each with its own brief, schedule and usage rights. A mixup (wrong file, wrong link, wrong brand cc'd) isn't just embarrassing, it can breach a confidentiality or exclusivity clause.
One delivery, one brand, never a shared link
Never reuse the same link or folder for two different brands, even to save time. Every delivery has to be an isolated object, with its own access, so that a slip on one project can never expose another.
On xFer, each delivery is a standalone page with its own link: there's no way one brand lands on another's content, unlike a shared cloud folder where access easily overlaps.
Always name by brand and by date
A strict naming convention (brand name, date, type of content) across all your working files heads off most careless mistakes, especially during high-cadence stretches.
Check exclusivities before each new collab
Some contracts include a sector exclusivity clause (no competing brand for a set period). Before you accept a new collaboration, check that your current commitments don't rule it out: the costliest mixup isn't a file, it's an exclusivity conflict discovered too late.
In short
An isolated delivery per brand, systematic naming, and an exclusivity check before each new collaboration. Volume only becomes a problem when your organisation can't keep up behind it.