I experienced a critical bug where my entire board was wiped out unexpectedly. Is there a revision history or a backup I can access to recover the content?

Just to add a bit to what ​@Kartika Rawat  mentioned you can also find your boards in your creative Cloud App under your files. 

Cheers

Nate

Hi jonghoon lee!

I’m sorry about that. Can you check whether your Board appears in Recent Boards? 

Let us know if that helps.

Thanks,

Kartika