Use Rufus or Balena Etcher .
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gpg --verify SHA256SUMS.sign SHA256SUMS The key should belong to the Debian CD signing team ( DF9B 9C49 EAA9 2984 3258 9D76 DA87 E80D 6294 BE9B ). Once verified, write the ISO to a USB drive (minimum 2 GB for netinst, 8 GB for DVD).