Are you using any of the following file sharing  services? Do you use more than one to upload?

1. Mega Upload
2. File Factory
3. Rapid Share
4. Div Share
5. Best Sharing
6. Send Space
7. Uploading
7. File Send
9. Easy Share
10. Badongo
11. zShare
12. Amazon S3

If you want to upload same file to more than one of these file sharing services you can have try on the website Tiny Load