The legacy `PUT /group/{uuid}/storage/` operation was deprecated in the pyuploadcare project’s migration issue. For the current REST API flow, get the group’s file UUIDs, then call `PUT /files/storage/` in batches of at most 100. The group-info response lists file IDs; the batch-store response includes `problems` for UUIDs that were invalid or missing.

Split the IDs into batches no larger than 100 and inspect each response’s `problems` and `result` before considering the group processed. The current REST reference documents the batch endpoint and limit; it does not specify a removal date for the legacy route.