Originally Posted By: kevs
So I did remove that text, 5mb file, and those ones still have no icon preview.

The suggestion wasn't "Maybe the icon preview isn't showing because the name contains the phrase '-5MB-file'."

The suggestion was "Maybe the name contains the phrase '-5MB-file' as a reminder that it was saved without an icon preview."

Changing the name of a file won't change what's in it. If it doesn't have an icon preview, it still won't under any other name. (Changing the filename extension (the .dng part) will affect how the file is interpreted and how it's displayed, but even that won't change what's in the file.)

A rose by any other name would smell as sweet.