do all convicted bank robbers serve their time in federal prison or do some serve their time in state prison?

Question

I would like answers from people with direct experience not just opinions please

Answer 1

People convicted of state crimes serve time in state prisons.
People convicted of federal crimes serve in federal prisons.

That's the general rule -- though there are rare exceptions.
Bank robbery may be prosecuted either at the state level, as robbery (among other things) and at the federal level, if the bank was federally insured. So, it could be either, depending upon who brought the charges (state or federal) and which level the conviction was at.

Answer 2

Bank robbery in the US is a federal crime....prosecuted by the US Attorney's Office....upon conviction of bank robbery....one serves his/her time in the federal pokey.