I'm trying to open a Samsung Gear Sport smart watch.

The screws appear to require a Tri-wing driver. However, none of my drivers are doing the job.

The screws, surprisingly, aren't showing hardly any damage from my failed attempts.
(I've tried various sizes down to 0.06mm, which should not be too wide.)

I'm wondering if these aren't standard screws. Either my driver's bit isn't actually inserting, or (my belief) the impressions in the screw heads are shallower than normal.

My current thought is to file down the tip of one of my screwdrivers, but before I potentially ruin a tool and strip a screw head, I thought I should check with wiser minds.

Does anyone know what I'm talking about or hace seen this type of thing?
Or have direct experiences with these smart watches?

TIA for any input!