There's no space left, or a quota is used up. Free up space or raise the quota.
Content over a size limit is a Fil.InvalidRequestError instead, because freeing space doesn't help with it.
Summary
Types
@type t() :: %Fil.StorageFullError{ __exception__: term(), disk: Fil.Disk.t() | nil, op: Fil.Op.name() | nil, path: String.t() | nil, reason: term() }