All USB mice are capable of sending to a PS/2 port. This was by design because there are still many people who need to use PS/2 (for KVM's and such), but it is not reasonable for companies to continue to manufacture 2 separate items. Because of this, adapters like those are purely passive as the mouse itself is the one that figures out what it is connected to.

However, it doesn't work the other way around since PS/2 devices never had any idea of what USB was.

I did come across something interesting though, it looks as though you can plug a flash drive into a USB->PS/2 converter and then plug that into a PS/2->USB converter. Not really sure how that actually works though.

All USB mice are capable of sending to a PS/2 port. This was by design because there are still many people who need to use PS/2 (for KVM's and such), but it is not reasonable for companies to continue to manufacture 2 separate items. Because of this, adapters like those are purely passive as the mouse itself is the one that figures out what it is connected to.

However, it doesn't work the other way around since PS/2 devices never had any idea of what USB was.

I did come across something interesting though, it looks as though you can plug a flash drive into a USB->PS/2 converter and then plug that into a PS/2->USB converter. Not really sure how that actually works though.