Apple UDIF read only compressed (Bzip2) in my iMac !!!

I've notice a new device added to my iMac :

"Apple UDIF read only compressed (Bzip2)"

What ? Why ? and How did it get there ?

Why do I need it ?

I think but not sure that it was added after the last iTunes update (ver 12.1)

Any explanation will be appreciated .

PS

It doesn't appear in my Finder ...

Thanks

Screen Shot 2016-09-17 at 21-1.41.33.png

Screen Shot 2016-09-17 at 21.41.25.png

Screen Shot 2016-09-17 at 21.44.33.png

iMac, OS X El Capitan (10.11), null
Has invited:

howapple - hello

Favor from:

It is the disk image for the Flash Player installer that you downloaded.

It is not mounted, so it will not show up in the Finder.

With it selected as shown in the second screen shot, click the mount button. Then, eject the disk in the Finder.

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