To further clarify and elaborate, USB flash drives can go bad. This is especially likely when they're used heavily for an extended period of time and/or when they're exposed to high temperatures. Both things can happen to a drive used for TeslaCam, and especially if you make heavy use of Sentry Mode, too. An affected drive might suddenly become read-only; seem to change in size; begin producing corrupt files (but not in the systematic way noted in my previous post, where only the lower part of the image is affected); or become completely inaccessible, to name just some failure types I've seen. SSDs use the same general type of circuits that USB flash drives do, but different chips are manufactured to different specifications in terms of the number of read/write cycles and temperature sensitivity. Such information is hard to track down for a lot of consumer products, though, and I don't know the extent to which different ratings would make any real difference in a drive used for TeslaCam. Thus, I can't recommend specific devices. You might have better luck using a device that's rated for use at high temperatures and/or for more read/write cycles, though. You'll need to dig into spec sheets to find this sort of information. One thing to definitely avoid is el-cheapo generic devices you'll find on eBay or the like. These drives are, in my experience, built to the lowest possible quality for sale at the lowest possible price. I've had only about a 50% success rate with such devices, even when used at room temperature for light duty cycles.
