how to transfer files to new external sdcard
I got a real 128 gb card, here I simply copy pasted over my DCIM folder, then I put the new sdcard in and rebooted my phone, on startup the phone recreated the /Android folder and all apps had rights to their new folders.

so my method:


backup and delete all aps that use the SD card
format the sd card
take a photo to generate the DCIM folder
insert SD card in your compuer
delete the /Android folder (it will be regenerated when you insert the card in your phone)
move relevant files to the DCIM folder
insert sdcard in phone
restart phone
reinstall aps from backup
do something that makes them regenerate their folders (ie down load a file, take a picture ect)
restart the phone
for all aps that cannot write to their own folder, delete he app and delete their /Android/data/com.company.app_name folder then go to 8