You should now be able to see your memory card in Settings > Storage (Android version may dictate this slightly) and browse the files on there.
When opening the camera it should also detect memory card and let you save to this as default (if that's what you want to do).
And if you plug into a PC or laptop through usb cable then Windows should also detect your card and let you browse/copy to it
Current device : Note 10 5G
Samsung Support Centre