安裝 apps 出現 couldn't install on USB storage or SD card

近裝 app 排經常性會出現呢個問題, 究竟係唔support 定其他問題

我用 gs2 android 4.03 official
rooted..

Your problem will be solved by SD card unmount flow blow instruction:
1: setting
2: storage
3: in sd card storage part unmount sd card
4: install your desire applications
5: mount sd card

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