Hi @no13benny, sorry for the late reply, I have been out of office due to vacation.
Does the SD card still work in her old Xperia device? There isn't anything different in the Xperia 10-series compared to older devices, the same type of SD cards are supported, just a bigger size as the device is newer.
If the SD card reader is defect, it will be the same with a different SD card so I can't promise that it will work with a brand new one. Do you or your wife have the possibility to just try with a different SD card? Perhaps if you can borrow from a friend, colleague or family member before you spend money on a new SD card.
Let us know how it goes!
