rick.p: sure it is unique? it appears realtek based like the Samsung I did posted above... try an 'lsusb' to get the full serial from it (shown as 'iSerial'), because serial it's often partial on unraid guid, missing some digits at left... then search the full serial on Google, if you can find it then it is not unique and despite not yet blocked it may get blocked on the future... I did found mine on usbflashspeed.com, they seem to list details of a lot of flash drives / card readers, guess they build db automatically from some speed test tool...