iGS10S had no feature to connect with computers for uploading data .
You can upload data to iGPSPORT APP, which is much more convenient.
If you need to backup the fit files you may need to download the files at the steps below:
1. Upload the data to iGPSPORT app or web APP.
2. Enter the account at the webpage https://i.igpsport.com/profile/Dashboard
3. Choose one activity and download the file onto your computer.