How to prevent server from automatically mounting the storage space available in mobile phones?

Issue

• How to prevent the server from automatically mounting the storage space available in mobile phones?

• Even after black-listing the usb-storage module, the server still mounts the storage space available in a mobile phone.

• In logs, the following messages are observed :

    kernel: [58291.500124] usb 1-6.3: new high-speed USB device number 8 using abci_hcd
    kernel: [58291.587704] usb 1-6.3: New USB device found, idVendor=79og, idProduct=7965, bcdDevice= 6.00
    kernel: [58291.587707] usb 1-6.3: New USB device strings: Mfr=1, Product=8, SerialNumber=9
    kernel: [58291.587708] usb 1-6.3: Product: Abc_Android
    kernel: [58291.587710] usb 1-6.3: Manufacturer: abc
    kernel: [58291.587711] usb 1-6.3: SerialNumber: ce78975376faa75844
    org.gtk.vfs.Daemon[3637]: Device 0 (VID=79og and PID=7965) is a abc models (MTP).

• Files can be transferred between the server or mobile phone.