Garmin’s data strategy is to get data from your device to Garmin Connect.
For the 920XT this is either: by Wi-Fi; by Bluetooth via your smartphone; or via a USB cable and Garmin Express.
I quite like Garmin Express and have never really had problems with it.
However I was recently a little annoyed when I discovered that Garmin Express no longer keeps a copy of FIT files on your HARD Drive. It used to keep a copy in a folder named like this: C:\Users\(username)\AppData\Roaming\Garmin\Devices\Unit ID folder\History
It now uses the folder shown here
However as soon as the data is uploaded it is deleted.
No local backup 🙁
No local storage to use for SportTracks or Firstbeat ATHLETE (for me…other apps for you maybe) 🙁
However. OMB’s £5 plugin for SportTracks called the Garmin FIT Devices Plugin will access your 920XT as a Mass Storage device and then copy the data PERMANENTLY to this folder:
C:\Users\_USERID_\AppData\Local\ZoneFiveSoftware\SportTracks\3\Imported\Garmin mass storage device – Edge® 200-500-510-800-810, Forerunner® 220-620\
Sorted. That plugin also imports all the lovely special data in the FIT file. So for the 920XT it’s a good purchase.
This may all change: https://support.garmin.com/support/searchSupport/case.faces?caseId=%7Bafea30d0-9b70-11e3-d5f4-000000000000%7D – that link suggests that the ‘leave a copy on your PC’ functionality SHOULD be there. Maybe it will be added.
Another option may be to use tapiriik.com or fitnesssyncer.com to sync your data automatically from Garmin Connect to dropbox and hence to your PC. This has a cloud based backup as well of course. However an automated service from tapiriik has a small fee. I have not checked if the full FIT file is saved…it might only be a TCX file. (A Fit EXPORT from Garmin Connect has only recently been re-instated, I believe)