Umm strange.
There certainly used to be an option for this on GC (not on any devices though) but I can't see it anymore and think has been removed.
Default was always don't delete anyway.
What GC version are you using? I just updated mine to the seemingly latest 4.0.21.0
yep same version tim.
seemed to perhaps start doing it after that update to 4.0.21??.
it has just done it (deleted) again now. I came back from a ride quickly checked the garmin/activity folder on the device and there it was dated 25/5. then I saw it disappear and the 'GC sync complete' message appeared. FIT files from 19/5 and before are still there
strange and mildly annoying
edit: just done the watch RETIRE and re-add as suggested above. Doesn't work unfortunately.
Has anyone tried it with a 920XT yet? I don't want to upgrade if it deletes my FIT files on the device. Also, if you sync via WiFi does it still delete the FIT Files? Thanks.