This has probably been covered somewhere in the guts of the thread, but I can't see a way to search a specific thread....I have a 7.0 build installed to internal flash. I'm not 100% sure who built it, but it's a version with working internal DVB tuner. My 2 questions are:
Can I use the internal upgrade file to upgrade to the latest of these 8.0 builds?
And will doing so lose my data (Kodi "watched" status is really all I care about).
I would say you do not loose it if you upgrade via putting the SYSTEM and KERNEL files in the update folder. If you want to be sure, create a kodi backup prior to the update.