Just some notes I made as I was looking at your files -
unless you really need to conserve space then change to 1 second recording as all files are averaging around 15secs between data records. ensure you have a GPS fix before moving off.
863K3957 - no data between 10min35sec and 16min38sec, spracotic GPS data, not a lot of moving time compared to elapsed time. 863J4614 - not a lot of moving time compared to elapsed time. 863J0823 - not a lot of moving time compared to elapsed time. 863D3439 - not a lot of moving time compared to elapsed time. 86394414 - not a lot of moving time compared to elapsed time. 862K0150 - not a lot of moving time compared to elapsed time. 862H2404 - not a lot of moving time compared to elapsed time. 862D1128 - not a lot of moving time compared to elapsed time. 862B2510 - not a lot of moving time compared to elapsed time. 85ID2836 - very small file, not a lot of moving time compared to elapsed time. 85GD5324 - not a lot of moving time compared to elapsed time. 85GA3438 - not a lot of moving time compared to elapsed time. 85ED4614 - not a lot of moving time compared to elapsed time. 85E94513 - not a lot of moving time compared to elapsed time.
This folder contains the files which should now hopefully upload to GC.
Thanks a lot for that, i'll do that once i get home. I had the data recording setting set to 'smart', is smart better for battery life because i do some long walks.