Got a used HP Probook laptop. Just needs a new drive. HP specs say it has an m.2 2280 slot. So that’s what I ordered. Guess I needed to look closer.
edit: Thanks for all the info, guys. Different types of keys are explained here. Gonna have to look for a sketchy no-name brand.
possily running into b vs m key situation. if you have a laptop that was made during the transition period of sata based m.2 to pci-e based ones, knowing which key you needed is important.