There are several questions, particularly on Super User, which refer to the use of these drives but there isn't a standard term in use nor a standard tag. Though SU has 'thumb drive', it is not consistently used.
Would there be any advantage to having a standard tag to ease searches?
Taking the initial responses into account the preferred terms (in order of usefulness) seem to be
[retag-request]
?USB
because translation issues withflash
andstick
are fraught with complications! No-one complains because in our context the meaning ofUSB
is unambiguous.