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Since new software update I can't deleted data off my rider 35?  Before the new update a window use to pop up when uploading asking if you want to delete data off device after uploaded, this no longer appears!!!  Also, when logged in the 'my device' menu option has gone?
Now, every time I upload data, it rewrites over last data which I have made comments in for my coach to see which is useless to me and my coach.
How can I delete the data on my device every time I have uploaded it?

Please help