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![](https://lemmy.world/pictrs/image/8db92d27-ab28-4b20-9fa2-f556ae77adec.png)
I think that slot is probably designed for SSDs instead of HDDs. SSDs are significantly slimmer and would fit there without fouling the side panel. From the promotional material I can see of your case, it looks like it comes with a cage designed to hold 3.5" HDDs - to fit this drive properly you’ll need a caddy to adapt it to fit that, and install it into there instead.
Oh, don’t worry, it’s only bad for the common people so that doesn’t count.