Install application from external usb disk on xperia Z5 problem?

[angck]

I cannot install appilcation from external usb disk on xperia Z5 problem after update to

Android 6.0 Marshmallow.  

It only allow to explore the contents in the externalUSB disk

[Rickard]

Hi,

To install an app from an external USB drive, you first need to enable Settings -> Security -> Unknown sources. Then connect your USB-drive and go to Settings -> Device connection -> USB Connectivity -> Detect USB device.

To install the apk, you then need to download a file manager from Google Play like ES File Explorer where you open the USB drive and tap the apk-file. The native file explorer will not let you do this i'm afraid.