My Passport SE have soft sides?

WD External Drives WD Portable Drives
1

If I push softly the sides of my passport se it clicks…
is it the natural or the way it is or I dont know. Its my first time having an external HDD and its WD!
plz help!

2

If you have this model is normal to feel that it clicks when you press it on the sides, not sure for other versions.

3

Were they the same essential without SE and essential with SE?