looks like 16G is running, when i need some RAM what ist exacltly rigth i order it there
https://www.compuram.de/arbeitsspeicher/qnap/nas/ts-series/serie/ts-251a-ts-251-ts-351-ts-451a/16gb-memory-kit-2-x-ram-8gdr3l-so-1600-x882d.htm