I was abroad and training, uploaded a few sessions via laptop, had to do ANT transfer, then nothing would appear until I did a manual upload from within Garmin as well. Then all seemed fine. I deleted no sessions from device 901XT. Trained a few more times then came home. Did ANT transfer to main computer, took a long time, promising, then nothing in Connect for those sessions. Tried the same manual upload trick, nothing. Tried on laptop, seemed to be uploading again, but now stops after initial stages of upload on either computer. No data. Not only that, but now there is no data on the device either for that period, so looks like during an upload somewhere it might have deleted it?
Hopeless to be honest.
Any ideas?