[Google Pixel Questions & Answers] The Lich:
Hello all. Long time lurker, occasional poster - hope you can help me out here.

So, I came from a stock rooted Pixel running the June security update, and recently moved everything over to a combo of Stock ROM + ElementalX kernel + Magisk v12 with some help from a handy guide here on the forums.

To my chagrin, I noticed that StickMount Pro no longer functioned with MagiskSU. Not that big of a deal - I learned to live without.

*However*

Now I seem to be unable to delete the sdcard directory tree starting at /sdcard/usbStorage/, regardless of what all I've thrown at it.

In the terminal, each folder/subfolder looks like this: (ls -al)

. . .
drwxrwx--x 2 root sdcard_rw 4096 2017-06-15 21:14 sda4
. . .

There's notably just sda4 - sda36, skipping a few between, then sdb1, sdc1, sdd2 - sdd 13.

There's these folders under /sdcard/usbStorage/ : (ls -al)

.
. .
drwxrwx--x 2 root sdcard_rw 4096 2017-06-15 21:13 00BC-614E
drwxrwx--x 2 root sdcard_rw 4096 2017-06-15 21:14 57f8f4bc-abf4-655f-bf67-946fc0f9f25b
drwxrwx--x 2 root sdcard_rw 4096 2017-06-15 21:14 _
. . .

One of those looks like a device's UUID.

I've tried:

- Removing with SolidExplorer, and as root.

- su rm -rf /sdcard/usbStorage (received permission denied errors)

- su; busybox rm -rf /sdcard/usbStorage (just for completeness)

- Reinstalling StickMount and trying the various unmount options, as well as unticking the "create /sdcard/ directories" option

Since these failed me, I began trying to change the folder/group permissions across adb:

- chown -R 777 /sdcard/usbStorage , then rm -rf (still permission denied)

- addgroup $(whoami) sdcard_rw (unknown user "root")

- addgroup root sdcard_rw (unknown user "root")

The `mount` command lists nothing related. Only the following:

rootfs on / type rootfs (rw,seclabel)
/dev/root on / type ext4 (ro,seclabel,relatime,data=ordered)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,size=1896652k,nr_inodes=474163,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
proc on /proc type proc (rw,relatime,gid=3009,hidepid=2)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,seclabel,relatime)
none on /acct type cgroup (rw,relatime,cpuacct)
none on /dev/stune type cgroup (rw,relatime,schedtune)
tmpfs on /mnt type tmpfs (rw,seclabel,relatime,size=1896652k,nr_inodes=474163,mode=755,gid=1000)
none on /config type configfs (rw,relatime)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
none on /dev/cpuset type cgroup (rw,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)
pstore on /sys/fs/pstore type pstore (rw,seclabel,relatime)
/dev/block/dm-1 on /vendor type ext4 (ro,seclabel,relatime,discard,data=ordered)
/dev/block/sda25 on /firmware/radio type vfat (ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,fmask=0337,dmask=0227,codepage=437,iocharset=iso8859-1,shortname=lower,errors=remount-ro)
/dev/block/sdd3 on /persist type ext4 (rw,seclabel,nosuid,nodev,relatime,data=ordered)
tmpfs on /storage type tmpfs (rw,seclabel,relatime,size=1896652k,nr_inodes=474163,mode=755,gid=1000)
adb on /dev/usb-ffs/adb type functionfs (rw,relatime)
/dev/block/sda35 on /data type ext4 (rw,seclabel,nosuid,nodev,noatime,noauto_da_alloc,data=ordered)
/dev/block/loop0 on /magisk type ext4 (rw,seclabel,noatime,data=ordered)
/dev/block/loop0 on /system/etc/hosts type ext4 (rw,seclabel,noatime,data=ordered)
tmpfs on /system/xbin type tmpfs (rw,seclabel,nosuid,relatime,size=1896652k,nr_inodes=474163,mode=755)
tmpfs on /sbin type tmpfs (rw,seclabel,nosuid,relatime,size=1896652k,nr_inodes=474163,mode=755)
/dev/fuse on /mnt/runtime/default/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /storage/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /mnt/runtime/read/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /mnt/runtime/write/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)

Also, any attempt to mount/umount things throws the error:

mount: bad /etc/fstab: No such file or directory

etc...

I'm just hesitant to re-install SuperSU for fear of how it will clash with TWRP and Magisk *and* break SafetyNet just to try to remove this dir.

Could these somehow be related to the /dev/fuse filesystems?

Any help at all would be appreciated.

If I can't effectively chown / chmod them, I don't quite know how to proceed.