怎样修改vold.fstab才能互换内外存储卡大神们帮帮忙

求大神解答 万分感谢 由于本人要换内存卡，手机自带太小，安装软件后数据存放不够用的，查看教程后说有个vold.fastb文件修改下就可以，我看到的都是别的手机教程，求大神破解606w如何修改 附上vold。fstab文件内容，求破解修改办法## Vold 2.0 fstab for HTC Passion### - San Mehat (san@android.com)## ######################### Regular device mount#### Format: dev_mount [optional_flags...]## label - Label for the volume## mount_point - Where the volume will be mounted## part - Partition # (1 based), or ✀auto✀ for first usable partition.## - List of sysfs paths to source devices## optional_flags - Determine whether the volume is encryptable or nonremovable####################### Mounts the first usable partition of the specified devicedev_mount sdcard /storage/ext_sd auto /devices/platform/msm_sdcc.1/mmc_hostdev_mount usb /storage/usb auto /devices/platform/msm_hsusb_host