I may have found the reason for the reboots. The internal storage was too full! I received a notification, and indeed, the storage was down to <100MB! I'm not sure why, because I hadn't downloaded all of the apps I'd previously had.
I quickly moved as many apps as possible to the SD card and cleared app cache, as well as changing one app's cache to external. Then, I slowly moved apps back to internal. I have over 1GB internal, and 6GB external.
I had never received a notification before the factory reset. Another strange thing is how much external storage I have now. I use Astro, and routinely clear out obsolete files, but was struggling to keep even one GB free.
Thank you all for your help.
I quickly moved as many apps as possible to the SD card and cleared app cache, as well as changing one app's cache to external. Then, I slowly moved apps back to internal. I have over 1GB internal, and 6GB external.
I had never received a notification before the factory reset. Another strange thing is how much external storage I have now. I use Astro, and routinely clear out obsolete files, but was struggling to keep even one GB free.
Thank you all for your help.