The largest file you can upload in Lumin is 200MB. Here's an overview on file size limits on each Lumin plan:
Feature | Free | Starter | Pro | Business |
Document size | 20MB | 200MB | 200MB | 200MB |
Merge | 20MB | 200MB | 200MB | 200MB |
OCR | - | - | 200 pages and 30MB | 200 pages and 30MB |