Once you have pressed F10 and collected screenshots of the ride how do I get it to link those to my Strava ride in the easiest way please? Could someone please run me through the steps…
In order for pictures to show up on Strava, you have to upload them to Instagram. Take a look at this blog post for more info: http://blog.strava.com/strava-instagram-5584/
…and the pictures have to be uploaded to Instagram within 45 min upon completion of your ride.
Thanks! I already have my instagram account linked to Stava just never realised there was a PC version of it and assumed it was just an app. So on my PC I go to the instagram website and upload the photos from there?
I think you need to use a 3rd party app to upload from a PC. You can Google around for one if you want to use that option. Or, you can always copy the pictures to your phone and then upload them from the Instagram mobile app.
Ok thanks for this. Is it possible to edit the path to which the screenshots are saved at all? It would be great if I could save them to my NAS as that would make it even easier to use the Instagram phone app for uploading.
I don’t think it’s possible to change the save directory at the moment. You could probably write a quick script to copy them to the NAS though.
I can probably set up a task on the NAS to backup the folder too I guess, thanks for the help 
I haven’t been able to sync photos for about 2 weeks now. Something changed and the time zone data sent to Strava no longer matches my time zone where the screenshots are taken. Anyone else having this problem?
Instagram’s API does not allow for automatic uploads, so zwift’s hands are tied there in terms of automation.
From your pc/mac, move the screenshot to your Dropbox or Google Drive. Open the Dropbox or Google Drive app on your smartphone (I have an Android device), select the screenshot, choose ‘export’ and move the screenshot to the ‘internal storage’ of your phone, alternatively the folder ‘downloads’. Next, open the Strava app and choose ‘edit activity’, touch ‘add picture’, choose ‘downloads’ or ‘internal storage’ and select the screenshot(s) you’d like to add to the ride. Done. You can do this at any time, for any ride, without the Instagram workaround which indeed imposes a time limit, time during which you should be enjoying a post-ride ale or espresso, not fiddling with your phone 
Late to the party but still works and great tip (belated) thanks Tim! Even more useful to get non instagram or out of time photos on to an outdoor ride after the event.