USB connections to car radios

Hi erwerte HiFi-Freaks As an absolute layman in this field, I have a technical question for you: More and more radios are sold with a USB interface, to which you can also easily plug a USB stick. Of course, a slot on the radio front is practical, in which you simply plug the stick into. Now there are also radios, where the connection is externally led out by cable. This has the advantage that the stick can remain on the radio if e.g. the B The radio should then continue to play where it has stopped. That shouldn’t work when the stick is plugged on and plugged off, right? Maybe someone can post reviews.