I have a 32GB external micro SD card which has been formatted in the tab itself. Also the platform.xml file has been edited to allow write access to the card, which works properly eg using Astro to copy files.
Problem is, TWRP can't see the external SD card. When I select external_sd in the TWRP file manager it does not show the files and folders there. If I backup using Online Nandroid Backup and try to save it to external SD, it instead goes to some obscure directory in the internal storage.
Any help much appreciated!