Hi, don't know the PB 614 and if it has an internal SD. If so, you need to
1) remove the card
2) make an image of this card,
3) burn the image to a new card
and
4) change the content of it according to this thread:
https://www.mobileread.com/forums/sh...d.php?t=278728
There are several ways described in the thread, I would recommend the one in this post:
https://www.mobileread.com/forums/sh...0&postcount=93