[gruez]

How does this work with SSDs supporting TRIM? If it's enabled, that large block of space would be erased by the SSD. If you put a large file in its place, that's also suspicious (huge block of random data). If you disable TRIM, also suspicious.

[szszszsz]

Nitrokey Storage uses SD card, which AFAIK does not support TRIM. Before first usage it is overwritten with a random data. Drive is presented to the OS like any regular (non-SSD) flash drive device, hence I do not think OS would issue TRIM on it.