Are you trying to delete a factory kit or one you made/loaded? Factory kits can’t be deleted unfortunately.
I hope I’m wrong but you can’t delete your snapshots without a computer. You need to connect the OP-1 via USB and delete the files that way.
Yeah, sadly I don’t think there is a way to delete a kit without connecting to a computer…
Many thanks. I will try this later and let you know if it worked fine.