Delete Analytics Data

Interesting that it didn't clear out all the 'Analytics Data' files. I always has on my phones. Just out of curiosity, under Settings/Privacy/Motion & Fitness, do you have 'Fitness Tracking' turned on? If so, turn it off, then do another 'Sync' with iTunes and see if it clears those other 9 files. Also, do you have both 'Share iPhone Analytics' & 'Share iCloud Analytics' turned off? It's possible those 9 files weren't deleted if they're on. Keep in mind that more files will be created. I synced my phone yesterday and I already have 2 'Stack' files .

'Sync' your iPhone to iTunes, rather than just performing a 'Back Up'. In the 'Back Up' window of iTunes, make sure the 'This Computer' is checked. If not, check it, then in the lower right of the screen hit 'Apply', then 'Sync'. That should clear out all the 'Analytics Data'.

If I were going to try this, I would do:

Settings > General > Reset > Reset Location & Privacy