Your new phone should have come with an otg adapter. Its a little thing, like a USB stick, except it has a male usb c on one end, and a female usb port on the other.
The usb c goes into the new phone and use the usb port to connect to ur old phone using its charging cable.
Maybe because you have an A series it may not have come with one, i know the S and Note do. If not they are literally a couple of quid and u can buy them anywhere online.
You don't necessarily need the adapter btw, if both phones were usb c for example and u have a usb c to c cable, then it'll connect without the adapter.
