Howto: trash storage...

What firmware version were you using at the time?

I'm 90% sure some 2v11 from a while back...

I just tried the code you posted here on an up to date Bangle and it seems to work fine for me

Maybe it could have something to do with my earlier testing? I think messages.json already contained a bunch of largeish messages, could Storage loading those, adding more, and then writing back to the same file break things?

I'll try to remember to document errors a bit more if it ever happens again, instead of just going whoops-reflash.