You can upload files through the Strava website: up to 25 at a time for subscribers and up to 15 at a time for non subscribers. Strava accepts TCX, FIT, and GPX files, and each file must be 25 MB or smaller.
Save the files you want to upload to a local folder on your computer.
Log in to Strava.com and click the orange "plus" icon at the top-right of the screen, then choose Upload Activity and File from the menu.
Click Choose files, browse to the local folder where your files are saved, and select the files you want to upload. Subscribers can upload up to 25 files at a time; athletes who are not subscribed to Strava can upload 15 files at a time.
