我想在android stuido终端中使用adb shell查找模拟器文件。我正在尝试以下步骤，这使我被拒绝。我如何获得许可？
pc$ adb -e shell
generic_x86:/ $ ls
ls: ./init.usb.configfs.rc: Permission denied
ls: ./init: Permission denied
ls: ./init.rc: Permission denied
ls: ./init.usb.rc: Permission denied
ls: ./init.zygote32.rc: Permission denied
ls: ./metadata: Permission denied
ls: ./ueventd.rc: Permission denied
ls: ./init.environ.rc: Permission denied
acct bin bugreports cache charger config d data default.prop dev etc
lost+found mnt odm oem proc product sbin sdcard storage sys system
vendor
1|generic_x86:/ $
实际上我想访问模拟器的SD卡。