Installed USBMOUNT on raspbian stretch in rpi3b+. Now I can't copy files from my phone to the mounted USB drives on pi using ssh via a file explorer

[SnoopyMV]

Installed USBMOUNT on raspbian stretch in rpi3b+. Now I can't copy files from my phone to the mounted USB drives on pi using ssh via a file explorer

Steps to replicate

1. I have Kodi, retropie, Raspbian running on my pi with Kodi boots first.
2. I installed USBMOUNT so that any USB connected get auto mount and also installed aria2 along with it. Aria2 download path is set to a folder in USB drive mounted.
3. I am able to create a folder in USB driver using SSH via a file browser app in my phone.
4. But when I try to copy a file from my phone to the mounted USB driver. The app throws error file can't be copied.(I used to copy files from my phone to the USB driver before installing USBMOUNT via SSH)
5. I uninstalled the USBMOUNT and its related dependencies. The above mentioned behavior still exist.

Can someone please help me out on this :(.