Exporting JPG fails

Dear all,

I've dowloaded more than 700 pictures from Camera to my Ipad Pro and edited with Lightroom mobile. Now I need to export JPGs but Lightroom stuck after a while and I cannot export all files to archive them.

I tryed exporting groups of pictures but occasionally lightroom get some errors in some files and does not export them. It doesn't advise me wich one are the not exported and It's very difficult check pictures one by one.

Can you please let me know how to transfer the whole Photo collection to a desktop device?