update: no more step tracking, sleep and inconsistent heart rate

You can't copy it from one watch to another, you need the firmware update file. Garmin should provide it, I don't know why they don't want to.

Could you share the full path? So what comes after Firmware for the 165 Music?

So 2 weeks+ now since the update and still nothing from Garmin - KS ? Where is the accountability? More Redditors just today saying that their devices are crashing and not reliable. I'm almost ready to jump ship.

I'm not sure what you mean, there's an instruction file with details. If you're unsure of how to do it rather wait for the next official update from Garmin.

Hi Jarquers, did the process on the weekend and my watch is finally working again. So again thank you very much !

Nice, I'm happy to hear that 

Garmin, please make the old firmware files available for this watch and also others. It would really help users in cases like these.

Indeed, 2 weeks+. There must be something going on at Garmin. No communication at all about the issues. Last week I contacted the servicedesk. I did the steps they told me and nothing helped. Now I have been issued a replacement. I prefered a direct replacement and paid an installment. So I would not get without a watch. Only.... We are almost one week further and I have still no replacement. It isn't even ready for shipment. Absolutely a disgrace. 

I also experience since the 27.09 update a lot of difficulties with my Garmin forerunner 165 music.

During running my heart rate stays at 70-75 and the watch reacts really slow on starting, pausing and ending an activity.

Also my steps are inaccurate just as tracking my sleep. The same issues what everyone else is reporting.

I’m in a marathon trainingsblock and this really bothers me.