To modify the Bandwidth file to Backup uses please launch the File to Backup control panel and click on the Bandwidth tab.
Please ensure you set your connection speed correctly:
1) Set the number of connections to use: this setting tells file to Backup how many threads to use to upload a file at any time.
2) Set the download and upload bandwidth sliders: this controls how much of your total internet connection bandwidth the software uses. When these are on 100%, file to Backup will transfer files as quickly as possible – using all of your bandwidth if necessary. If these are reduced, e.g. to 50% then file to Backup will limit itself, never using up more than 50% of the available bandwidth and leaving plenty for other activities.