The One America News video linked below illustrates how USB drives are used to transfer vote counts and, gosh, sometimes they (and the votes on them) can get lost!
Tampering? Chain of custody? Eh, who cares, as long as the Democrat wins.
Flash drives show up in the video around 11:00.
WATCH: Chanel Rion on “Dominion-izing the Vote” (29:56)
https://www.youtube.com/watch?v=746HTjhFifA
Note how YouTube inserts "Nothing to see here, just move along" warning boxes below the video, lest someone see something YouTube doesn't like.