I have a thunderbolt with alot of my apps on the sd card. whenever i get updates i get a bunch of update unsuccessful notifications. when i click on the notification it takes me to the market with a pop up screen that says installation error Couldn't install on USB storage or SD card. only option is ok. if i try to update it multiple times the same thing happens. now if i take it off the sd card it will update normally, but i would rather not take 20 apps off and put them back on every time i get an update. when i first put apps on the sd card they would always update but they havent been for weeks now. also i use optimize toolbox and it tells me which apps can be put on the sd card.