AS ABAP7.5 trial error on v box:"/sbin/mount.vboxsf: mounting failed with the error: No such device"

Hello,

I install the virtual box on my amd64 machine, and then the "openSUSE-Leap-42.1-DVD-x86_64" and as abap 7.5 on my external disk . using external disk for linux and as abap.

By running the command "sudo mount -t vboxsf netweaver netweaver", i obtain the error "/sbin/mount.vboxsf: mounting failed with the error: No such device".

Actually in the netweaver folder (ls...), the "install.sh" file and the others are not displayed.

I am a biginner in linux and would appreciate your help.

Best regards

Armando