another update, confirmed card works fine in my S5 phone.
Card works fine in S5 phone and PC via usb stick sdcard device. Also tested that can read data on card when fully written.
Card does not work fine in S7, it will show up as a unsupported sd card device, if select to format it, then the format fails with a error 40 code. Other S7 owners have confirmed this EVO+ card works on their phones so should not be compatibility issue.
I observed using disk info pro app, the sdcard is visible as a unmounted 119 gig device. So is defenitly been recognised by kernel.
In the recovery app TWRP, nothing can be done with sdcard at all, it acts as if no sdcard in place, but looking at the boot log for the recovery the card is shown as detected but fails with a unknown reason to mount.
At this point indications would suggest faulty sd card slot on my S7, but my existing 64gig card still works on the phone.
Is very odd but I can only see this as either a partially damaged sdcard or (sadly) more likely partially damaged sd slot on phone. The S7 uses the horrible tray system to insert sdcard's, my S5 has the much better fixed port under battery cover but of samsung did away with removable battery covers on their new phones.