Just started using Sleepyhead on my Mac to track events, etc. Followed excellent instructions on creating automatic full data backups of S9's limited 7 day dataset.
PROBLEM: it appears that the data cuts off roughly 3-4 AM, every night! This is indicated on the timestamp of the files off the SD card, as well (of course) in the Sleepyhead displays. Time/data is correct on the unit.
For example, timestamp on data last night ends at 3:50AM. But I slept until 5:40AM.