Mobile-only downloads: compare permissions and file handling

If a download works on mobile but not desktop web, use the same safe file and account to compare both attempts. Say whether the desktop request never starts, is blocked by the browser, or finishes into an unexpected folder. Record browser and mobile app versions, local time, file type, and approximate size. Check one private window or another browser to isolate extensions and download settings, then report the observation without claiming a root cause. Keep signed URLs and private filenames out of the post.