SD卡不可用可按照下面的方法操作试试:
1、重启一下手机。
2、将SD卡取出查看触点位置是否有脏污或损坏,使用酒精擦拭后重新装入。
3、使用其他设备读取内存卡是否正常,若能读取可将资料备份后格式化内存卡尝试。
4、进入设置--更多设置--恢复出厂设置--还原所有设置,还原所有设置是不会丢失手机数据。
5、尝试更换一张SD卡试试。
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