Root 機 or upgrade to android 5.0.0 才可寫入External SD card?

不能寫入電話External SD card from PC using EZ File Manager
不想Root機,但又upgrade唔到Lollipop...
OS: Android 4.4.2 Kitkat...
THX

4.4係唔得
一係upgrade 5.0一係root

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