Few months ago i got the "Activity storage almost full. Upload to Garmin Connect" message on my 245. So i connected the watch to my laptop, and deleted some Fit files and all was good.
Last night i got the message again so now i have deleted all the Fit files and we will see how we go.
I thought the watch was supposed to automatically delete old activites and replace with new ones as the watch memory gets full?
I always connect to garmi connect after every run too.