SSD installed in Key 61, write protected from PC

Hi

I just got my Key61, had a bit of trouble getting my Samsung EV0 870 SSD installed (cable was very stiff and didn't click in to start with) but it was then recognised by the Key61 avd could save projects etc...but when I tried to add data from my PC in controller mode, it tells me the SSD is write protected...No such problem with usb stick.

Ideas?

Thanks - will do that - starting to think a fast USB stick is better!

Thanks very much - used diskpart info you supplied, deleted any read-only flag from the SSD and also added a new windows registry key with value zero (the key did not already exist) to disable read only globally. All works! Now for the next issue...