Can no longer transfer apps or access apps on SD Card after software update

A

AC Question

I recently updated my Sony Xperia Z3 to Marshmallow and I was unable to access any apps that I had on my SD card. I read that I need to format my SD card so I backed it up, formatted and then put all the files back on my SD card.

The apps now display their icon but immediately crash when opened, even the low processing apps. I cannot transfer any apps from my internal storage to my SD card anymore and have no space to download anything now.

How do I fix this?
 

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