Really appreciate the detailed response. Y’all are truly the gold standard for the support you provide here.
Great feature, for sure!
It’s actually the exact opposite situation, I got the Megan used, and it’s still got all of Ash’s data on it. Curious what’s going on here…
definitely should’ve been more detailed with with I was trying to do 
Setting up the Megan onto Nothing Fancy, I wanted to make sure the logs were clear. When I went to the records page and hit sync, it shows a “downloading record X of 430-something”. When I did that, I quickly force closed the app to stop the upload of all those records (because I didn’t want to need to delete the one-by-one haha)
I then re-formatted the Megan’s file system (in an attempt to remove the logs before I synced/downloaded them to my phone/cloud), getting the error that I posted about.
When I reconnected on the app and clicked sync, it still tried to download 400-some records (I force closed again.). A couple did download before I did this, and checking the records, they were definitely Ash’s old ones.
Thinking something had failed during formatting, I posted the picture trying to solve the reformatting issue, thinking I could solve my issue trying to reset records 
If there’s a way that I could save the records for Ash that’d be pretty cool (but he said he didn’t care about them so nbd).
If you can’t think of a way to go about resolving this, this seems like a reasonable-enough resolution. Sync from the Megan, then delete from the web interface. 
btw, I love that you’ve recorded which Megan data was recorded on. Probably only a handful of folks that will ever benefit from that, but as someone that now has two Megans, this is so cool