Is there any risk of data corruption if I store TrueCrypt containers inside a fully encrypted USB (USB encrypted using Veracrypt)?
Does encryption inside encryption increase chances of data corruption or other issues?
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Nested containers are supported by both TC and VC.
There should be no problem whatsoever.
There is no reason to have additional data corruption.
Sectors are encrypted individually. A bad sector of the container file data area will only affect a bad logical sector inside the container. Nothing more. The same sector would of affected the same file in the same amount for both plain writes or encrypted writes.
The only probability of corruption will be due to your storage media (the USB stick).