Q: Apple IIe Disk II Drive

Greetings,

I recently acquired an Apple IIe and II Plus. I have two Disk II drives, and I can't get either of them to work, even though they both worked when I had originally purchased them only a week ago. I'm unsure of what could have happened in the meantime. I took this video showing the noises one of the Disk IIs makes on the IIe (On the II Plus, it just clicks in one phase and then stops completely, without trying again and producing the noisier sounds). The other drive does what this drive does on the Apple II Plus on both computers. I'm not 100% familiar with older computers and am trying to learn from these experiences. Any help is greatly appreciated.

Niels