I am trying the trial version and it's brilliant with my Galaxy S9+ with plenty of memory, but I like to use my previous phone (an S7, with 32Gb internal and 64Gb external) as a music player - but Tunefusion just stopped with errors when it filled up the internal space. BUT I cannot find the files on the phone to delete them and start again with a new sync with a smaller selection of tracks.

Is it possible to tell Tunefusion to use the external card - or would I have to remove it and sync to it as a USB stick?