I bought an RCA tablet (above mentioned) a while ago, and I have an issue now. It gets stuck in its boot up stage, and will not get out. Booting up in safe mode results in the same thing happening. Wiping the cache partition resulted in it saying that the wipe failed. Same with factory reset. Mounting the system fixed nothing.
Sounds like the internal storage may be damaged. If you want to try and save it, or at least save your data, I would take it to a local tech and see if they can do it. It would not be something you could easily do on your own.