Default Internal memory problem

Hello guys. I have a huge problem with my internal and external memory on my tablet. I cant install nothing because my tablet cant mount my memory. All commants from AdB doesn't work. Recovery boot or restore to factory settings doesn't work too because my tablet stuck. And my tablet doesn't have volume butons. I have tried anything from vold.fstab without solution. Please guys help me and sorry for my bad english.

My tablet is MID model but i dont know more.