Not that reliable

I bought these primarily to back up a bunch of important but little-used data. Out of 5 or 6 that I have used so far, a couple have not had problems. One simply refused to mount on three different devices. One mounted fine but appeared to disconnect itself after ~15 GB was written, and could not be mounted in any device after that. Another one mounted fine and had ~30 GB copied to it, but when mounted on the other device to download the data it would only stay mounted for a couple of minutes at a time before spontaneously vanishing from the OS, interrupting any operation going on. These may be OK for immediate transportation from one device to another, if the buyer will check everything and has time to do it over. But I cannot really recommend them for keeping anything on, and even as just transportation they are iffy.

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