Can´t move datadir

this is my first time running ncp and i don´t have much experience with Pi´s.
I want /media/USBdrive/ncdata to be my datadir and it says Path exitst.
But when i click apply this comes out:
[ nc-datadir ] (Sat Dec 12 16:40:59 GMT 2020)
{“reqId”:“FORItNz8fqWLPX2R7inU”,“level”:2,“time”:“2020-12-12T16:40:59+00:00”,“remoteAddr”:"",“user”:"–",“app”:“no app in context”,“method”:"",“url”:"–",“message”:“Temporary directory /media/usbdisk/ncdata/tmp is not present or writable”,“userAgent”:"–",“version”:“”}
Error reading data directory. Is NextCloud running and configured?

and also when i go to https://nextcloudpi i get a error that says there is no .ocdata