[gentoo-user] executing a file on a usb thumb drive

[William Kenworthy]

I have an encrypted usb thumb drive I use to transfer files from work 
(Win10) to home (gentoo) - the encryption and access is via a program 
that is stored and executed from the thumb drive.

Some time back, it became impossible to execute files stored on the 
thumb drive.  I found I could get it to work if it was mounted within 
the users home directory.  Since the last round of updates that has 
become broken as well.

I presume the culprit is something in eudev/udisks/polkit/elogind (this 
is an openrc system)

Can someone point me to a guide on how to set up executing files from a 
usb thumb drive on gentoo?

Thanks,

BillK.