Update: Ordered a second one because the first one does the job. The write-protect switch moves so easily that I don't trust it myself; There's no latch, the switch doesn't need to be pressed, and it's not countersunk. I flipped the switch slightly by pressing it with the edge of a piece of printer paper. I wrapped tape around the hard drive to prevent the switch from accidentally going into read/write mode. However, the write-protect mode prevents writing to the disc.
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