My gran-daughter was wanting a way to get 'instant' pictures like the old Polaroid. (The cost of film is ridiculous!) Found a portable 4x6 photo printer at a thrift shop. When first tried to make it work found that the USB port Is-NOT. Something called PictBridge ONLY.
'Is not' what?
PictBridge is USB. There are several different USB connectors. PictBridge uses type A at the printer end. Any office supply store should have a USB cable type A to whatever her camera has for a USB port at the other end.