For the first time since purchase a few years ago I tried a factory reset to potentially cure issues we were having a) with Disney+ intermittently playing the "splash screen" but then just a black screen (ffwd / rwd showed thumbnails of output, but when play was hit a static screen shown) and b) the aura's Chromecast being non-functioning for about 18 months.
Was quite surprised that after confiriming that this would wipe "everything" that on re-booting all of the previous recordings remained. Pleased, tbh, as that would have been my preference if I'd had the choice.
Not tested out whether the issues are cured, but was effectively treating this as a bog standard Android device which often require a fresh factory reset after a prolonged period of use to sort out "gremlins".
It's a shame this box hasn't fulfilled all of its potential, but it still does the right job for me day in day out (mostly!)