Hi. I just bought a new Samsng Galaxy Ace GT-S5830 and I'm having problems downloading apps onto it. I downloaded and installd a few ok, then it stopped installing any. It downloads the app then won't install it, saying "downloading unsuccessful", then "Installation error - couldn't install on USB storage or SD card" after googling some sollutions, I tried uninstalling the update of Android Market. This allowed me to download and install one app, then it wouldn't work gain, despite me trying the same 'fix'. I'm starting to think my 'smart' phone is not so smart... can anyone pleade help?