Not at low temperatures.

https://www.scientificamerican.com/article/fact-fiction-glas...

You can get a 6mmx6mmx1.2mm pure industrial diamond sheet for about $1000 [1]. That should be able to hold around 300 GB with this method and would last practically forever.

[1] https://e6cvd.com/us/material/single-crystalline.html?utm_so...

This is mostly a myth based on some medieval glass panels that had structurally wider bases. This material is going to take until the heat death of the universe to deform 1mm at room temperature. I'm sure it'll be fine for way longer than it will take for the data to fail in a different way.