The drive obtained by the Manhattan District Attorney’s office reportedly is being stored in a radio-frequency-isolation chamber to protect it from remote tampering - presumably from Kremlin agents who might have an interest in destroying the evidence. This is extraordinary stuff.
"The hard drive—which includes potentially revealing notes showing how
Trump and his accountants arrived at their tax numbers—is believed to be
locked in a high-security annex in lower Manhattan. A spokesman for the
Manhattan District Attorney’s office declined to confirm the drive’s
whereabouts, but people familiar with the office presume that it has
been secured in a radio-frequency-isolation chamber in the Louis J.
Lefkowitz State Office Building, on Centre Street. The chamber is
protected by a double set of metal doors—the kind used in bank
vaults—and its walls are lined with what looks like glimmering copper
foil, to block remote attempts to tamper with digital evidence. It’s a
modern equivalent of Tutankhamun’s tomb."