Apps stored on unrooted Samsung Infuse ext SD card will not show in file manager.The new steps I took to upgrade SD card.1 In file manager, under apps on SD card, choose option to move to phone. Do this with all apps stored on SD card. 2... copy contents of ext SD card to temp down load file. 3...Go to SD card and phone storage. Your available space and total space should be the same. Unmount sd card 4 safe removal. 4....Power down the phone. Remove battery then the sd card.5... install upgraded sd card and replace battery and cover power on phone..6.. Go to sd card and phone storage, format new sd card.7... return to your file manager. And copy contents of your temporary file to your knew sd card. At this point you have the option to leave your apps stored on the phone or return them to the sd card. If all is well delete items in temp storage.( my observations) indicates that even if the ext sd card shows apps stored on it ,the app is only partially stored on the ext SD card . A 100 megabyte app may only have 50 to 100k stored on the Ext card. Someone who is a lot smarter than me please check my procedures to see if they are correct. If not please correct them .Thank you...( To not try is to have already failed.)