Uselly you get this for apps installed to SD Card, this option has caused nothing but issues in my opinion... I suggest to move all apps on sd back to internal memory because the device has more than enough storage and there isnt any reason a user would need to use the sd card for the apps.
i've never even seen an option to "download to sd card." i download them to the phone and then move them to the sd card, and have never had any problems. what app is giving you an option to download it directly to the sd card???
I will guess it probally is Angry Birds, so many users have reported the sd card error and all they had to do was move apps back to internal memory or simply dismount or remove the sd card and update works fine..
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.