Hi,
Thank you very much for your feedback. Your feedback is very valuable for improving our product in the future.
For the file upload, not all files from your hard disk will be uploaded. We only upload executable files, and only if we don't have the same file in our server.
Currently you can set the limit for daily upload that suitable for your internet plan (from Settings->Universal AV->Daily Upload Limit). If you have files in certain folders where you do not want to upload, you can specify them in the exclusion list (from Settings->Scan Settings->Exclusions).