刷了miui后，想交换内外sd卡，遇到问题，望大神解答

mishalai

刷了miui后，想交换内外sd卡，就按照红米的方法，来修改 dev_mount sdcard /storage/sdcard0 emmc@fat /devices/platform/goldfish_mmc.0 /devices/platform/mtk-msdc.0/mmc_host dev_mount sdcard2 /storage/sdcard1 auto /devices/platform/goldfish_mmc.1 /devices/platform/mtk-msdc.1/mmc_host 改成 dev_mount sdcard /storage/sdcard1 emmc@fat /devices/platform/goldfish_mmc.0 /devices/platform/mtk-msdc.0/mmc_host dev_mount sdcard2 /storage/sdcard0 auto /devices/platform/goldfish_mmc.1 /devices/platform/mtk-msdc.1/mmc_host 就是将数字互换 然后保存 但是重启后发现内外SD卡没有交换，而且外置卡系统找不到了，这是什么原因啊，要怎么改才能达到目的呢