There is no ‘Tapes’ anymore.
Everything is Digital.. RE.. Solid state.
The “Memory Chip” and associated “Motherboard” is encased into a cylinder that can sustain sledgehammer blows.. it is filled with Beeswax to prevent (sea)water from contaminating it as well as preventing “crushing Sea Depths” from collapsing the cylinder.
If the memory chip cant be read its because someone hit it with many many volts/amps to fry it.