Repeated password request error when attempting to transfer pictures from iXpand flash drive to PC

I backed up my iphone pictures to the iXpand drive however before I delete them from my phone completely I would like to make another backup on my Seagate backup drive via my laptop.

I can find the iXpand files when I plug it into my laptop however when I select Copy / Paste to transfer the folders to the backup drive it is asking me to create and confirm a password for each and every picture I have in that folder.  There are thousands…

What am I doing wrong as the ease of transfer between the iXpand and pc was the main reason I purchased :frowning: