Mount USB OTG to specific destination folder I've got a Moto G with 4.4.2 and, as stock OTG functionality is broken in the latest android version, I need a way to mount my mini USB card reader (meenova) to /sdcard folder.

From what I've found on the internet I have to use this shell (I'm trying to use it with tasker):

"mount -o rw /dev/block/sdb /storage/emulated/0" or "mount -o rw -t vfat /dev/block/sdb /storage/emulated/0" Neither of them worked for me

/deb/block/sdb is the location of my sd when plugged in and /storage/emulated/0 is the phone internal memory (or at least I think so, I've also tried using just /sdcard but no luck either)

I was able to mount the sd card using Stickmount app from Chainfire but it mounts it to /sdcard/usbStorage/sda and I need it to be just /sdcard (plus if I manage to do that with tasker I don't need another app installed).

What can I do? Thanks.
It's actually real simple but you need work from recovery. 
All things mounted go through some script called fstab. 
And don't go change anything until you know sure that's right to do. 
Some info can be found in a map called MNT and PROC. 
However never try to alter those because it could lead to bricking your
device. 

Some textfile examples are MOUNTS and PARTITIONS where you can find detailed info. Mounting however uses the fstab folder as device parameter info point.  So think adding or changing it might work. 
Here an fstab textline as example. 

/dev/block/mmcblk0p9 /system ext4 rw


You might find more info when googling for android fstab properties. 
Still altering them in any way is up to you.