Whether you can transfer money from your prepaid debit card to a bank account will depend on the type of prepaid card you have.
If you have an online account for the prepaid card such as Bluebird.com or Brinks.com prepaid debit card then yes you can transfer the money from that prepaid card to another bank account through a funds transfer.
If your debit card offers the option to transfer the money to your bank account there should be a link and option for funds transfer in your prepaid debit card account.
You may also be able to take the prepaid debit card to your bank and ask them if you're able to put the funds from that card into your checking or other bank account as sometimes you can.