The Sandisk Cruzer Extreme 128GB USB thumbdrive (SDCZ80-128G-G46) is working perfectly on my QU-16 for multitrack recording. For all you NL/BE QU-users out there, I bought this exact model: https://www.bol.com/nl/p/sandisk-cruzer-extreme-usb-stick-128-gb/9200000061274789/