Sorry I meant to say uploading files to my android phone from zwift, it'll an already completed activity 

Hello @Ianio1 

Thanks for posting about this.  It is possible to manually upload a completed Zwift ride to your Strava account, but you would need to use a computer, not a Mobile phone to complete it.

1. Please download a copy of your missing activity. You can access a new activity file by visiting your account on: https://my.zwift.com > Activities.

2. Click on your activity in question (1), select the gear icon (2), and Download Fit File (3).

3. Upload the file directly to your Strava account: https://www.strava.com/upload/select

Also, you can set up your Zwift account to automatically sync your activities to Strava.

I hope that helps, let us know if you have more questions.