Question about Ugreen NASync DXP2800

Hello everyone I’m looking for a suitable 16GB DDR5 RAM module that’s compatible with the Ugreen NASync DXP2800 model. At the moment, I’ve got the standard 8GB installed, but I reckon 16GB would make the whole thing run a bit more smoothly :) Does anyone know of a suitable RAM module that both works and is available on Digitec? Many thanks for your help Regards, Cargostar