Cannot upload any courses to Fenix 3 - Everything is soooo buggy and frustrating

I have the exact same problem and would love to find a solution! Riding courses is so important.

"Restore Defaults" on my fenix 3 did the trick. I was able to send courses now.
Downside: you have to reconfigure everything... (takes me 10mins)

I have similar issue. I've made two courses - one I added via Garmin Connect (mobile -> bluetooth) but I'm unable to upload the second one - I get synchro errors all the time. Don't want to restore defaults because of a small bug. Garmin, do you have a solution?

EDIT: I did restore it to default settings but it didn't help - still can't upload courses (iOS 8.2, than 8.3 - still the same).

I finally got my courses synced again to my fenix3.
The culprit for me was: course names that are too long.

Once I shortened all the course names down to the number of characters that would fit on the watch display, I had no trouble syncing the courses anymore.

Another method that did work also was to connect the fenix3 to a computer in USB mode, open the folders on the device and put the gpx file directly into a folder named "NewFiles". The bad thing about this option is that the course is not available in Garmin Connect, since I put it directly into the device bypassing Garming Connect.

I tried shortening names but not that much as you did. I'll give it a try. And I have my courses created in Garmin Connect so manual upload could also do the trick. I'll try and let you know.

Shortening doesn't help in my case.

Uploading courses using Basecamp works best for me. Never had any troubles.
You have to use USB though...

I resolved it!
No Tools (Basecamp, Garmin Express etc) required.
Just copy the gpx file in the folder /garmin/garmin/newfiles (where the 1st. /garmin is the drive or volume the 2nd /garmin is the folder in the volume and /newfiles is the folder inside the folder /garmin)

The Problem for me was: I cant see the Folder Newfiles, because its hidden (on my Version of Fenix 3)
so the only trick is, to unhide the NewFiles folder:


MAC (OSX):
Open Terminal: -> easy way search in Spotlight (press CMD SPACE and enter 'Terminal' )
in Terminal Unhide the Newfiles Folder : chflags nohidden /volumes/garmin/garmin/newfiles (just copy this command as it is)
thats it!

WINDOWS 8:
Open Windows Explorer
Open Folder Garmin inside Volume Garmin
Press Administration (German Verwaltung) in the Ribbon Bar of the Explorer
Check "Show Hidden Elements"
Klick right on the Hidden Folder "Newfiles"
Press ALT ENTER (Properties)
Uncheck "Hidden"
Thats it.

WINDOWS XP,7:
Control Panel -> Folder Options -> Show hidden Folder
Open Windows Explorer
Goto the Folder //GARMIN/Garmin
Klick right on the Hidden Folder "Newfiles"
Press ALT ENTER (Properties)
Uncheck "Hidden"
Thats it


Test on Mac / Windows:
Open Finder on Mac or Windows Explorer on WinXP,7,8...
Goto Volume or Drive Garmin
Open Folder Garmin inside Volume Garmin, you will find the NewFiles Folder
drag any gpx files into this folder (use short filenames myride.gpx, LesAlpes1.gpx etc)

Test on Fenix 3
reject the device
the files are shown in Navigation -> Courses
(there is some time you have to wait, i think the F3 does internal conversion of the newfiles data)

Uploading courses using Basecamp works best for me. Never had any troubles.
You have to use USB though...

Works like a charm! Great discovery mate.

For people using Alfred on Mac. Here is a fast workflow to toggle hidden files: https://github.com/BubiDevs/manage-hidden-files

Worked a treat MICHA thanks very much for the info! That was frustrating me!