Hi, see you tube for a failed update resolution, there are autel tech tips and video to
solve handheld tool update failed issues.

 If you still have a valid update subscription, and get a message of insufficient space exists, even if you have added a 32gb memory card, try going to the Vehicle Management App and see what vehicle Apps can be moved to external memory, and try again. If you haven't already added a 32 gb memory card, you need to get it now. If you don't have added SD car, for the interim you could delete some car apps you never use to see if it takes.