@Ed_P - those pics didn’t show up until I clicked the link. that is a serious malfunction for sure, but I haven’t had issues like that yet. you can’t rule out the possibility that it was defective and that the heat issue wasn’t at fault.
@Chin - it heats up while idle because it’s still running. there’s much more heat during data transfers.
I didn’t reformat.
it hasn’t caused any problems for my USB port yet, even though I did big transfers the other day. while I’m assuming the best, I’m still going to use it economically. for more routine data transfers I’ll probably use the 16gb flashdrives.