can data from one sd card be transferred to another without a computer?

Does your phone have USB OTG support?
IF no, copy the data to your phone, change sd card, paste it back into the new sd card.
 
Only possible solutions:
1. Copy to Phone then to New Sd card.
2. Take another phone and then use Bluetooth to transfer from one phone to other phone.
 


this is it,
http://www.nextodi.co.kr/